The volume of the cube that has an edge length of 0.017m is 4.9 × 10-⁶m³.
How to calculate volume of a cube?Volume is a three-dimensional measure of space that comprises a length, a width and a height. It is measured in units of cubic centimeters in metric, cubic inches or cubic feet.
The volume can be calculated by multiplying the length, breadth and height of a three-dimensional shape such as cube.
According to this question, a cube has an edge length of 0.017m. The volume can be calculated as follows:
Volume = 0.017 × 0.017 × 0.017
Volume = 0.000004914
Volume = 4.9 × 10-⁶m³
Therefore, 4.9 × 10-⁶m³ is the volume of the cube
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How many moles of cobalt (Co) atoms are there in 9.00x10^9 (9.00 billion) Co atoms?
Be sure your answer has the right amount of significant digits.
The number of moles of cobalt (Co) atoms in 9.0 x 10⁹ Co atoms is 1.49 × 10-¹⁴ moles.
How to calculate number of moles?The number of moles of a substance can be calculated by dividing the number of atoms of the substance by Avogadro's number as follows:
no of moles = no of atoms ÷ Avogadro's number (6.02 × 10²³)
According to this question, 9.0 x 10⁹ cobalt atoms is given. The number of moles can be calculated as follows:
no of moles = 9.0 x 10⁹ ÷ 6.02 × 10²³
no of moles = 1.49 × 10-¹⁴ moles
Therefore, 1.49 × 10-¹⁴ moles of cobalt are in 9 billion atoms of the element.
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When 3.98 g of bismuth oxide (molar mass = 465.96 g/ml) reacts with excess carbon to form 2.97 g of bismuth metal (molar mass = 208.98 g/mol) according to the equation:
The bismuth metal has a percentage yield of 93.4%
What is the mass of the bismuth formed?We know that the reaction as shown in the question has to do with the reaction of the bismuth oxide with the excess carbon. this implies that the excess carbon is the reactant in excess while the bismuth oxide is the limiting reactant.
Number of moles of the bismuth oxide = 3.52 g /465.96 = 0.0076 moles
1 mole of bismuth oxide yields 2 moles of Bi
0.0076 moles of bismuth oxide yields 0.0076 moles * 2/ 1 mole
= 0.00152 moles
Theoretical yield of bismuth = 0.00152 moles * 208.98
= 3.18 g
The percent yield is now obtained from; 2.97 g / 3.18 g * 100/1
=93.4%
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Missing parts;
When 3.98 g of bismuth oxide (molar mass - 465.96 g/ml) reacts with excess carbon to form 2.97 g of bismuth metal (molar mass-208.98) according to the equation:
Bi2O3(s) + 3C(s) = 2 Bi(s) + 3 CO(g)
What is the percent yield of the reaction?
The attorney opened his case by stating, “The documentary evidence proves that Jared was in the victim’s car on the night of the crime.” What evidence is the attorney MOST likely using to prove this accusation?
A.
He found Jared’s cell phone in the car.
B.
He has witnesses who saw Jared in the car.
C.
He found Jared’s fingerprints in the car.
D.
He has a video recording of Jared in the car.
The evidence which the attorney will most likely use to prove this accusation is Jared’s fingerprints in the car and is denoted as option C.
What is Evidence?These refers to the information and happenings which help to prove that something is true and is used in investigations so as to ensure that the culprit is caught.
In this case, Jared’s fingerprints in the car is the most reliable information which puts him at the scene of the crime as it can't be edited and no fear of false witnesses as a result of this thereby making it the correct choice.
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Answer: C
Explanation:
if the temperature of a 11.5 mL sample of N2 gas is increased from 25.0° C to 75.0° C as its pressure remains constant, what will be its new volume in mL
11.5 ml sample of N₂ gas with 25°C temperature is increases to 75°C in constant pressure. The volume of N₂ gas at 75°C at constant pressure is 13.4 ml
Given that
V1 = 11.5 ml
T1 = 25°C = 298 K
T2 = 75°C = 348 K
We need to find the volume of gas (V2) at 75°C
We know that,
V1 / T1 = V2 / T2
11.5 / 298 = V2 / 348
V2 = (11.5 × 348) / 298
V2 = 13.4 ml
Thus, the volume of gas (V2) at 75°C = 13.4 ml
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The price of a visit to the dentist is calculated according to the formula 50 + 100n, where n is the number of cavities the dentist finds. On your last visit to the dentist, two cavities were found. What was the cost of your visit?
Substitute 2 for n and evaluate!
On your last visit to the dentist, two cavities were found and the cost of your visit is 250
One who is skilled in and licensed to practice the prevention, diagnosis, and treatment of diseases, injuries, and malformations of the teeth, jaws, and mouth and who makes and inserts false teeth
Here given data is the price of a visit to the dentist is calculated according to the formula 50 + 100n and where n is the number of cavities the dentist find and n = 2 then we have to find cost of your visit = ?
So, 50 + 100n
= 50 + 100(2)
= 50 + 200
= 250
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How many milliliters of 2.50 M HCl(aq) are required to react with 2.15 g Zn(s)?
A total of 1.104 ml of HCL is required to react with 2.15 g Zn(s).
What is HCL?Aqueous hydrogen chloride solutions are what we refer to as hydrochloric acid or muriatic acid. It has an unmistakable unpleasant fragrance and is colorless. A strong acid is how one would describe it. Most animal species, including humans, have it as a part of the gastric acid in their digestive tracts. There are numerous applications for hydrochloric acid. It is utilized in the manufacture of chlorides, fertilizers, dyes, and electroplating, as well as in the textile, rubber, and photographic industries. The skin, mucous membranes, and eyes are all corrosive to hydrochloric acid. A gas at ordinary temperature and pressure, hydrogen chloride (HCl) is a combination of the elements hydrogen and chlorine. Hydrochloric acid is a gaseous mixture of gas and water. HCl dissociates almost entirely, making it a powerful acid.
A stoichiometrically balanced equation
Zn(s) + 2HCl (a q) ---> ZnCl₂(a q) + H₂ m
Equivalent quantities of metal and hydrochloric acid.
Zinc moles = 2.15/65.39
= 0.032 mol
Moles of HCL = 0.134 mol × 2 / 2.50 × 10³
= 1.072 mol
So total = 0.032 + 1.072
= 1.104 liters
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QUESTION A DORA 10 GUMS herease the conflicten: to 894, Look a die tolane Mateled "If" dor hydrogeny Why ae bee sow 3 hydrogen some on the robs site of the talance taco on the left side?Increase the coefficient for NH3. Look at the balance labeled "H" (for hydrogen). Why are there now 3 hydrogen atoms on the right side of the balance but 0 on the left side?
The balanced chemical reaction equation as we can see from the question on the left and right hand sides;
[tex]3H_{2} + N_{2} ------- > 2NH_{3}[/tex]
What is the balanced chemical reaction equation?Now we know that we use the chemical reaction equation to show the relationship between the reactants and the products in the system. We know that there is need to balance the chemical reaction equation so that we can be able to make sense of a given chemical reaction equation.
A chemical reaction equation is said to be balanced when the number of atoms of each of the elements on the reactant side is the same as the number of atoms of each of the elements on the products side. This could also be called the process of making an atom count to show the number of each of the atoms present in the system.
The principle stated above is used to obtain the balanced chemical reaction equation. If we apply it, we would then be able to obtain the equation as have been shown in the answer section above.
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Describe the orbital diagram of an atom with six electrons. Explain how this orbital diagram demonstrates Hund's rule.
From Hund's rule, we can now see why the two 2p orbital electrons occur singly and are not paired in one orbital.
What is the Hund's rule?According to the Hund's rule, we know that before, we can pair the electrons that are present in the atoms of an element, the electrons must first of all occur singly or have the maximum parallel spins before they are pair.
In this case, we have an electron that has six electrons. The electron configuration of the element has been shown in the image attached. we can see that there are two electrons that singly occupy the 2p orbitals.
This serves to validate the Hund's rule.
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Answer:
We have an electron that has six electrons, and there are two electrons that singly occupy the 2p orbitals. According to Hund's rule, electrons arise singly in an atom before pairing occurs.
Explanation:
20 POINTS!
There are two stable isotopes of lithium. The atomic mass of lithium-6 is 6.02 amu, and the atomic mass of lithium-7 is 7.02 amu. The average atomic mass of lithium is 6.94 amu. Can you predict which isotope has a greater abundance based on its average atomic mass? Explain.
The isotope that has the greater abundance is lithium-7
To know which isotope has the greater abundance, we shall detertmine the abundance of each isotope. This can be obtained as follow:
Mass of isotope A (Li-6) = 6.02 amuMass of isotope B (Li-7) = 7.02 amuAverage atomic mass = 6.94 amuAbundance of A (A%) = A = ?Abundance of B (B%) = 100 - A =?Average atomic mass = [(Mass of A × A%) / 100] + [(Mass of B × B%) / 100]
6.94 = [(6.02 × A) / 100] + [(7.02 × (100 -A) / 100]
6.94 = 0.0602A + 7.02 + 0.0702A
Collect like terms
6.94 - 7.02 = 0.0602A - 0.0702A
-0.08 = -0.01A
Divide both sides by -0.01
A = -0.08 / -0.01
A = 8%
Thus,
B = 100 - A
B = 100 - 8
B = 92%
From the above calculations, we obtained:
Abundance of Lithuim-6 = 8%Abundance of Lithuim-7 = 92%Thus, we can conclude that lithium-7 has the greater abumdance
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What is the TLV value for acetone in parts per million
8 hours Short Term Exposure Limit (STEL) for 15 minutes is 750 ppm; Weighted Average (TWA) is 500 ppm.
The threshold limit value is thought to be the maximum exposure level that a worker may endure throughout a shift at work without suffering any negative consequences. TLV is technically a term that the American Conference of Governmental Industrial Hygienists reserves.
TLVs are the highest average airborne concentrations of hazardous materials to which healthy adult employees can be exposed over the course of a working lifetime—during an 8-hour workday and a 40-hour workweek—without developing noticeably detrimental health consequences.
The acetone TLV value in parts per million:
The acetone TLVs established by the ACGIH are 750 ppm for an 8-hour TWA and 1000 ppm for a 15-minute STEL.
According to OSHA, the acceptable exposure limit (PEL) for airborne particles is 1,000 ppm when averaged over an 8-hour work shift. The recommended airborne exposure limit (REL) for a 10-hour work shift is 250 ppm, according to NIOSH.
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The element X has a mass number of 40
and electron number of 20: Find
i- The atomic number of the element X
The name of the element X
The element X, which has mass number of 40 and electron number of 20 is Calcium (Ca) with atomic number 20.
What is mass number?
The total number of protons and neutrons, collectively known as nucleons, in an atomic nucleus is known as the mass number, sometimes known as the atomic mass number or nucleon number. It is roughly equivalent to the atomic mass of the atom, also known as its isotopic mass, expressed in atomic mass units. The mass number A is the same as the baryon number B of the nucleus because protons and neutrons are both baryons (and also of the whole atom or ion). Each individual isotope of a chemical element has a unique mass number. The number of neutrons (N) in a given nucleus is therefore determined by the difference between the mass number A and the atomic number Z: N = A-Z.
Here, Number of electrons = 20
Since, Number of electrons = Number of protons
So, Number of protons = 20
Mass number = 40
Mass number - Number of protons = Number of neutrons
Number of Neutrons = 40 - 20 = 20
Atomic number = Mass number - Number of neutrons
= 40 - 20
= 20
Therefore, atomic number is 20 and the element is Calcium with symbol Ca.
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Can someone please help me solve this and walk me through the steps to help my understanding?
A precipitation reaction occurs when 791 mL of 0.765 M Pb(NO3)2 reacts with 549 mL of 0.861 M KI, as shown by the following equation.
Pb(NO3)2(aq)+2KI(aq)⟶PbI2(s)+2KNO3(aq)
Calculate the theoretical yield of PbI2 from the reaction.
Calculate the percent yield of PbI2 if 88.6 g of PbI2 are formed experimentally.
Potassium iodide (KI) is the limiting reagent in the given chemical reaction. The theoretical yield of PbI₂ is 109.07 grams and the percentage yield of PbI₂ is 81.23 %.
What is a limiting reagent?A limiting reagent is that reactant in the chemical reaction which completely consumed from the reaction mixture at the completion of a reaction. The limiting reagent is the reactant which is used to calculate the theoretical yield of the reaction.
Given, the balanced equation of the chemical reaction is :
Pb(NO₃)₂ (aq) + 2KI (aq) ⟶ PbI₂ (s) + 2 KNO₃ (aq)
The molarity and volume of Pb(NO₃)₂ are 791 ml and 0.765 M respectively.
The molarity and volume of KI are 549 ml and 0.861 M respectively.
From the formula of molarity, the number of moles = Molarity × Volume
The number of moles of Pb(NO₃)₂ = 0.765 × 0.791 = 0.605 mol
The number of moles of KI = 0.861 × 0.549 = 0.473 mol
If one mol of Pb(NO₃)₂ reacts with KI = 2 mol
Then 0.605 mol of Pb(NO₃)₂ will react with KI = 2 × 0.605 = 1.21 mol.
But we have only 0.473 mol of KI. It means lead iodide will be the limiting reagent for the reaction.
If two moles of the KI form PbI₂ = 1 mol
Then 0.473 mol of KI will form PbI₂ = 0.473/2 = 0.2365 mol
The molecular mass of PbI₂ = 461.2 g.mol
The theoretical yield of PbI₂ = 0.2365 × 461.2 = 109.07 g
Given, the experimental yield of the PbI₂ = 88.6 g
The percent yield of PbI₂ = (88.6/109.07) × 100 = 81.23 %
Therefore, the percent yield of PbI₂ if 88.6 g of PbI₂ is equal to 81.23 %.
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What is the maximum number of moles of SO3 that can be produced by the reaction of 2.0 mol of S with 3.0mol of O2?
There are 2 maximum number of moles of [tex]SO_{3}[/tex] that can be produced by the reaction of 2.0 mol of S with 3.0 mol of [tex]O_{2}[/tex] .
The chemical reaction of the formation of [tex]SO_{3}[/tex] from S and [tex]O_{2}[/tex] is given as,
2S + 3 [tex]O_{2}[/tex] → 2 [tex]SO_{3}[/tex]
From the above chemical equation we can conclude that the 2 moles of sulfur and 3 moles of oxygen reacts to form 2 moles of [tex]SO_{3}[/tex] .
A chemical equation can be considered in terms of moles , or 6.023 times ten to the 23 , which is a predetermined number of molecules or atoms . We can then calculate the weight required for each compound using moles and atomic weight, which is the weight in grams of 1 mole of a specific element in reaction .
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A spring with a spring constant (k) of 300. N/m is stretched a distance of 0.30 m. Determine the force that was needed to stretch the spring.
The force that was needed to stretch the spring F = 90 N.
Consistent with Hooke's regulation, when a spring is stretched the applied force is proportional to the increase in duration from its equilibrium duration. The spring consistent may be calculated the usage of the formulation
k = -F/x
In which ok is the spring regular.
F represents the pressure and x represents the change in spring length. Represents the steady of proportionality, additionally known as the spring constant.
The spring steady okay is a measure of the spring stiffness. It relies upon at the feather and material. The higher the spring constant, the stiffer the spring and the much less it stretches. The constant of proportionality ok is known as the spring consistent. it is a degree of spring hardness. as the spring expands and contracts, converting its duration through x from its equilibrium length it exerts a force F = -kx within the course of its equilibrium role.
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Someone help please!
The average atomic mass of the lithium will be 11.00 amu
Average Atomic MassThe average atomic mass of an element is the cumulative sum of the mass of its isotopes multiplied by their respective abundances.
The average atomic mass is mathematically given by the following formula:
Average Atomic Mass = f1M1 + f2M2 + ......fnMn
Where f = abundance and M = mass number.
In this case, lithium has 2 isotopes.
Mass of isotope 1 = 7.0160
The abundance of isotope 1 = 92.5%
Mass of isotope 2 = 6.0151
The abundance of isotope 2 = 7.5%
Average atomic mass of Lithium = 7.0160 x 0.925 + 6.0151 x 0.75
= 6.4898 + 4.511325
= 11.00 amu
Thus, lithium with 2 isotopes has an average atomic mass of 11.00amu.
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Please help with this
Answer:
it is a high pressure.
Explanation:
im just guessing it
Warning signs are sometimes placed on aerosol cans to prevent people from throwing them into a fire, the contents of the gas in an aerosol can just after it is placed in a fire (c) it has a high temperature is correct option.
When an aerosol can is placed in a fire, the warning signs and precautions are typically in place to prevent potential dangers and hazards that could arise from the contents of the can. The behavior of the contents of an aerosol can in a fire can vary depending on the specific gas or substance contained within. However, some general principles apply:
Pressure Increase: Aerosol cans are often pressurized to allow the contents to be dispensed in a controlled manner. When exposed to heat from a fire, the pressure inside the can can rapidly increase. This pressure buildup can lead to the can potentially rupturing or exploding, which poses a significant danger to anyone nearby.
Potential for Fire Spread: If the contents of the aerosol can are flammable, they can contribute to the spread of the fire. The released flammable gases or liquids can ignite, leading to a more intense and widespread fire.
Toxic Fumes: The contents of some aerosol cans might include toxic or harmful substances. When heated in a fire, these substances can vaporize and release toxic fumes into the air. Inhaling these fumes can be hazardous to health.
Unpredictable Behavior: The behavior of aerosol cans in a fire can be unpredictable. Factors such as the type of propellant, container material, and contents can all influence how the can reacts when exposed to heat.
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Feedback can either cause a change in the system or keep it stable. Melting glaciers are an example of positive feedback.
Why is this considered positive feedback?
Feedback can either cause a change in the system or keep it stable. Melting glaciers are an example of positive feedback.
This is considered a positive feedback because melting of the glaciers would let the air and land of the surrounding get warmer which would cause the glaciers to melt faster.
A positive feedback causes a system to remain stable or causes a change in the system.Global warming is melting ice, thus it amplifies the loss of ice. It is an important feedback called ice albedo feedback.
The increased temperature of ice leads to a positive feedback. It is an increased internal friction heating (strain). This is a positive feedback because it leads to further heating of the ice from the inner side of the ice sheet.
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Can you please tell me
The image they show us is a solubility graph. It tells us the grams of solute that dissolve at a certain temperature. We must first identify the mentioned solute, this is NaNO3. We must draw a vertical line that passes through 30°C and a horizontal line that passes through 90 grams/100g of water.
When tracing the lines we see that the intersection is below the solubility curve of NaNO3. This means that there is less solute than the maximum amount that water can dissolve at 30°C. Therefore, all 90 grams will dissolve and we will have an unsaturated solution.
Answer: Third option. unsaturated
Consider the following ionic
compounds and determine which
has the higher melting point.
A. BeCl₂
B.Al₂S3
Al2S3 have higher melting point comparing to BeCl2 because of factual data and also that melting point increases down the group.
What is melting point and how the M.P. of Al2S3 is greater than BeCl2?As getting a bit from the word melting , it means the change of state from the solid to liquid.Melting point is that point at which the substance changes from solid to liquid state.Melting point is possible in the phases , soli-liquid , liquid - gas , in between phase change.We should also know that the melting point of water is 0 degree celsius.The melting point of aluminium sulfide is 1100 degree celsius and the melting point of beryllium chloride is 459 degree celsius.To know more about melting point visit:
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A sample of gas exhibit ideal behavior and occupies a volume of 350 point milliliters at 25.0 Celsius and 1.00 ATM how many moles of gas are present in the sample
For an ideal gas behaviour, we know that
PV = nRT
∴ n = PV/RT
• Given T = 25 °C = 273 +25 = 298K
R = 0.0821 atm/mole-k
P = 1 atm
V = 350ml = 350 /1000= 0.35 L
• n = PV /RT
= (1* 0.35) / (0.0821 * 298)
n= 0.0143 moles
• This means that 0.0143 moles of an ideal gas are present in this sample. ,
What is the oxidation number of nitrogen in nitrogen gas?Group of answer choicesA. -2B. -1C. -3D. 0
When we have a molecule, we have to identify if it is a charged molecule (ions) or a neutral one. If it doesn't have any sign of + or -, it means that the molecule is neutral, so the charge is going to be zero.
In this particular case, we have the nitrogen gas:
[tex]N_2\text{ \lparen g\rparen}[/tex]As we can see, it is a neutral molecule, so its charge has to be zero. As it is a molecule composed only of one element, then the oxidation number has to be zero (0).
Least dense and ends with the most
As per the provided figure, there is a presence of the multilayers of substances settled according to their density. The densest liquid will settle at the bottom while the least dense will float at the top.
What is density?Density can be said as the substance's mass per unit of volume when explained in the mathematical terms. The measure of how much dense a substance is can be taken out through a measure of its density.
Layers arrangedAccording to the pic the layers arranged here can be classified according to the order from least dense liquid to the densest liquid according to the provided order
Rubbing alcohol < Dish Wash < Milk < Corn Syrup
Then according to the respective positions of the solids arranged throughout the multilayer of the pic, the provided order can be devised that is from the least dense solid to the densest solid:
Ping pong ball < Beads < Popcorn Kernels < Bolt
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Complete Question
1) Order the following liquids in order form the least dense to the densest. Dish Soap, Rubbing Alcohol, Milk, Corn Syrup.
2) Order the following solids in order from the least dense to the most dense: Bolt, Beads, Ping Pong Ball, Popcorn Kernel
Why is the law of gravity, an example of universal law?
Answer: every object in the universe with some mass attracts every other object. As the law of gravitation could be applied to all such objects, it is also known as Newton's law of universal gravitation, that is, its application is universal.
Explanation:
Please help
Calcium carbonate can undergo a chemical reaction to produc calcium oxide (CaO) and carbon dioxide (CO₂). Which possible masses of calcium oxide and carbon dioxide can form when 400g of calcium carbonate undergoes this chemical reaction?
*
1 point
400g CaO and 0g CO₂
224g CaO and 176g CO₂
40g CaO and 10g CO₂
The atomic mass of the element neon (Ne) is 20.180 amu. Which measurement is correct?
1 point
1 gram Ne = 20.180 moles = 1.215×1025 atoms
1 gram Ne = 20.180 moles = 6.022×1023 atoms
1 mole Ne = 20.180 grams = 1.215×1025 atoms
1 mole Ne = 20.180 grams = 6.022×1023 atoms
When reactants of a reaction are known, which fact can always be deduced about the products?
*
1 point
the state of the products
the number of atoms in the products
the number of products
the mass of each product
The atomic mass of carbon (C) is 12.01amu and oxygen (O) is 16.00amu. Which molar mass is correct for carbon dioxide (CO₂)?
*
1 point
28.01 g/mol
44.01 g/mol
192.16 g/mol
268.01 g/mol
How many moles is in 43g of CO₂?
*
1 point
1204 mol
1.54 mol
2.59 x 10²⁵
According to the law of conservation of matter, which statement best describes a balanced chemical equation?
1 point
The number of moles of atoms of each element must be the same in the reactants and in the products.
The total number of moles of atoms must be the same in the reactants and in the products.
The total number of molecules must be the same in the reactants and in the products.
The number of moles of each molecule must be the same in the reactants and in the products.
Nitrogen gas combines with hydrogen gas to produce ammonia (N₂+3H₂⟶Ammonia). Based on the law of conservation of mass, which could be the product of the reaction?
*
1 point
NH₂
NH₃
2NH₃
3NH₂
How do you calculate the number of moles from mass?
*
1 point
it is the product of moles and molar mass
it is the quotient of mass and molar mass
it is the product of mass and molar mass
it is the quotient of avogadro's number and molar mass
Sugar reacts with oxygen gas to produce carbon dioxide and water (C₆H₁₂O₆ + 6O₂⟶6CO₂+6H₂O). Which ratio of components is correct?
*
1 point
For every 12 moles of CO₂ produced, 2 moles of C₆H₁₂O₆ is needed.
For each mole of O₂, 1 mole of C₆H₁₂O₆ is needed.
For every 5 moles of water produced, 6 moles of oxygen is needed.
What is the molar mass of NH₄Cl?
*
1 point
53.5 g/mol
50.5 g/mol
497.0 g/mol
The possible masses of calcium oxide and carbon dioxide that can form when 400g of calcium carbonate undergoes decomposition is
224g CaO and 176g CO₂; option CThe correct measurement of the element neon (Ne):
1 mole Ne = 20.180 grams = 6.022 × 10²³ atomsWhen reactants of a reaction are known, the fact that can always be deduced about the products is:
the number of products; option CThe correct molar mass correct for carbon dioxide (CO₂) is 44.01 g/mol; option B
The number of moles in 43 g of CO₂ is 0,977 moles.
According to the law of conservation of matter, the statement that best describes a balanced chemical equation:
The number of moles of atoms of each element must be the same in the reactants and in the products.
Based on the law of conservation of mass, the product of the reaction of nitrogen gas and hydrogen is 2 NH₃.
To calculate the number of moles from mass, take the quotient of mass and molar mass; option B
The ratio of components in the reaction of sugar with oxygen gas to produce carbon dioxide and water is:
For every 12 moles of CO₂ produced, 2 moles of C₆H₁₂O₆ is needed; option A
The molar mass of NH₄Cl is 53.5 g/mol; option A.
What is the molar mass of a substance?The molar mass of a substance is the mass of one mole of the substance.
The molar mass of carbon dioxide (CO₂) is calculated below:
molar mass of carbon dioxide, CO₂ = 12 + 16 * 2
molar mass of carbon dioxide, CO₂ = 44.0 g/mol
The moles of CO₂ in 43g of CO₂ is calculated as follows:
moles = mass / molar mass
Moles of CO₂ = 43 / 44 = 0.977 moles
The mass of CaO and CO₂ from the decomposition of 400 g of calcium carbonate is given below:
1 moles of CaCO₃ produces 1 mole of CaO and CO₂
4 moles of CaCO₃ produces 4 moles of CaO and CO₂
Mass of 4 moles of CaO = 4 * 56 = 224 g
Mass of 4 moles of CO₂ = 4 * 44 = 176 g
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what is the color of light from a photon with an energy of 4.40x10^-19 J
The color of light from a photon with an energy of 4.40x10⁻¹⁹ J is red
A photon is an elementary particle that is a quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves and the force carrier for the electromagnetic force
The color of a photon is determined by the wavelength of the emission and photons are quanta of light, meaning they are a specific unit of emitted energy and here given energy is 4.40x10⁻¹⁹J means when it come to visible light the highest frequency color is violet also has the high energy and when the low frequency of visible light which is red has the low energy and here the energy is low that's why the color of photon is red
E = 4.40x10⁻¹⁹ J
E = hc/λ
where, λ is the wavelength, h be the Plank's constant and c be the velocity of light.
h = 6.63 × 10⁻³⁴ Js
c = 3 ×10⁸ m/s
λ = 6.63 × 10⁻³⁴ Js × 3 ×10⁸ m/s/ 4.40x10⁻¹⁹ J
λ = 4.520 nm
So, color of light from a photon with an energy of 4.40x10⁻¹⁹ J is red
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1. When reactants react to form products, it’s technically called the ____________________________________. But sometimes, there’s an opposite reaction that occurs with the products changing back into the reactants; we call this a ___________________________________.
A reaction in which reactants react to form products is called forward reaction. In some reactions, products would change back into reactants which is called backward reaction.
In forward reaction, the reactants react with each other and forms product as a result. The reaction occurs from left to right in an equation.
In backward reaction, the products that was formed would revert back to form reactants due to surrounding conditions. The reaction occurs from right to left in an equation.
The type of reaction where both forward and backward reaction takes place is called reversible reaction. When the rate of the reaction between forward and backward reaction becomes equal, it reaches a state of equilibrium.
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Calculate the volume of 264 grams of NO gas at s.t.p
The volume of the 264 grams of NO gas at STP is 197.12 L
Volume of gas st STPAt standard temperature and pressure (STP),
1 mole of a gas = 22.4 L
With the above information, we can determine the volume of 264 grams of NO. Details below.
How to determine the volumeWe'll begin by obtaining the mole of 264 grams of NO. This can be obtained as follow:
Mass of NO = 264 gMolar mass of NO = 14 + 16 = 30 g/molMole of NO = ?Mole = mass / molar mass
Mole of NO = 264 / 30
Mole of NO = 8.8 mole
Finally, we shall determin the volume as follow:
1 mole of NO = 22.4 L
Therefore,
8.8 moles of NO = (8.8 mole × 22.4 L) / 1 mole
8.8 moles of NO = 197.12 L
Thus, 264 grams has a volume of 197.12 L at STP
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A function of the plasma membrane includes _______.
1. steroid synthesis
2. phospholipid synthesis
3. cell mitosis
4. letting water, certain ions and substrates into the cell
5. protein synthesis
A function of the plasma membrane includes letting water, certain ions and substrates into the cell (Option 4).
What is the plasma membrane?The plasma membrane is the main selective barrier that allows the interchange of nutrients and byproducts of the cell with its surrounding media (i.e., its external environment). The cell membrane allows the passage of substances such as water or ions by using protein channels or also the movement through active transport, which requires energy to proceed.
Therefore, we can conclude that the plasma membrane allows the passage of water and ions inside the cell.
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2. In a sample of copper carbonate, how much copper and oxygen would there be for
5 g of carbon? Use the ratio of copper to oxygen to carbon.
According to the concept of molar mass , in a sample of copper carbonate there would be 26.47 g and 20 g of copper and oxygen respectively.
What is molar mass?Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.
Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.
In the given problem , sample of copper carbonate has copper, carbon and oxygen in the ratio of 63.54:12:48.Now, for 5 g carbon , amount of copper is calculated as,
5×63.54/12=26.47 g
And amount of oxygen is calculated as,
5×48/12=20 g.
Hence, for 5 g carbon there is 26.47 g copper and 20 g oxygen in copper carbonate sample.
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The combustion of methanol (CH4O) is described by this balanced chemical equation:
2CH4O( g) + 3O2( g) → 4H2O( g) + 2CO2( g)
If the reaction is conducted and maintained at standard temperature and pressure (STP), how does the volume change when all of the reactants combine to form products?
volume decreases by a factor of 5/6
volume stays the same
volume increases by a factor of 6/5
volume increases by a factor of 2
The volume change when all of the reactants combine to form products then the volume increases by a factor of 6/5
Changing the volume occupied by a gas will change its concentration, and therefore, change the rate at which it reacts with other substances called volume in the reaction
Here given reaction is
2CH₄O( g) + 3O₂( g) → 4H₂O( g) + 2CO₂( g)
Then, if the reaction is conducted and maintained at standard temperature and pressure (STP) then all the reactant combine to form product then the volume increases by a factor of 6/5
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