The measurements which are listed in the proper mathematical relationship include:
PV=kV/T=kPV/T = kWhat is a Constant?This is used in mathematical expressions and has a constant value which doesn't change in expression.
Options A,B and C have the appropriate constants as pressure is usually multiplied by volume.
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Why would an atom be more likely to form a chemical bond than existing as an independent particle?
Answer:
Covalent bonds form from shared electrons. Nature favors chemical bonding because most atoms have lower potential energy when they are bonded to other atoms than they have when they are independent particles.
An arrow is fired at a target on Highwater how does the energy charge between the moment the arrow is fired and the moment it hits the target
A The potential energy and kinetic energy remains the same
B The potential energy decreases as kinetic energy increases
C The kinetic energy decreases as potential energy increases
D The kinetic energy remains at zero but potential energy increases
The potential energy decreases as kinetic energy increases. Hence, option C is correct.
What is potential energy?Potential energy is stored energy that depends upon the relative position of various parts of a system.
To shoot an arrow, the string has to be released. The kinetic energy is converted by the potential energy of the bow. Therefore, potential energy is converted into kinetic energy.
Hence, option C is correct.
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Compare the ability to hold on to / attract electrons between metals and nonmetals.
(Use the concepts and trends about atomic radius and electronegativity.)
Nonmetals have the ability to attract electrons better than metals because they have a higher electron affinity or electronegativity than metals.
What is electronegativity?Electronegativity is the tendency, or a measure of the ability, of an atom or molecule to attract electrons and thus form bonds.
An element in the periodic table with a high electronegativity will automatically have a high electron affinity.
Metals (low electronegativity) are known to lose electrons to non-metals (high electronegativity), hence, nonmetals have the ability to attract electrons better than metals because they have a higher electron affinity or electronegativity than metals.
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If a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its
volume at a pressure of 2.50 atm?
Answer:
1.44 L
Explanation:
If the temp does not change
P1V1 = P2V2
1 * 3.6 = 2.5 * V2
V2 = 1.44 L
What advantage do mineral base lubricants have over vegetable oil base lubricants when used in aircraft engines
Advantages of mineral-based lubricants:
Chemical stability is the advantage of mineral-based lubricants over vegetable oil-based lubricants when used in aircraft engines.
Lubricants used in aircraft engines:
Mineral oils are used in modern aircraft engines because they can maintain a specified viscosity over a wide range of temperatures. For instance, the capacity to function in temperatures between -10°C and 40°C is crucial for the start-up of an aircraft engine. Greater grade oils can be utilized at higher ambient and startup temperatures, but they are useless in arctic or freezing circumstances, where a synthetic multigrade would be more appropriate.
Because mineral oils are more fluid even at low temperatures, they can reach every part of an aircraft's engine far faster than vegetable oils can. As a result, the engine will start up with less wear.
Additionally, compared to vegetable oils, mineral oils can result in significant fuel savings of between 1.5 percent and 3 percent. The usage of mineral oils makes sense for operators attempting to stay competitive in the airline industry since it results in lower fuel costs as well as reduced expenses for maintenance and engine downtime due to excessive wear and extended active service life.
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How many grams are in 2.6 moles of ethanol (C2H5OH)?
Molar mass of ethanol
2(12)+5(1)+16+124+5+1729+1746g/molMass:-
No of moles×Molar mass2.6(46)119.6gAnswer:
Molar mass of ethanol (C2H5OH)
=2(12)+6(1)+16.1
=46.1 g/mol
How many grams I.e.,
mass = no. of moles × molar mass
= 2.6×46.1
= 119.86g2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2O
In the above equation how many grams of N2 can be made when 181 grams of CuO are consumed?
Answer:
21.2 g
Explanation:
From the coefficients of the equation, we know that for every mole of nitrogen produced, 3 moles of CuO are consumed.
CuO has a formula mass of 79.545 g/mol, so 181 g is equal to 181/79.545 = 2.275 mol.
This means we need 2.275/3 = 0.758 mol of nitrogen.
Nitrogen has an atomic mass of 28.014 g/mol, so the answer is (28.014)(0.758) = 21.2 g to 3 sf
) State the reason why it is not safe to keep the engine of a motor car runing for a prolonged period in a closed garage.
Answer:
The gas fumes are toxic
Explanation:
The extremely high concentrations of carbon monoxide produced by an engine can raise CO concentrations in a closed building so quickly that a person may collapse before they even realize there is a problem. Carbon monoxide reduces the amount of oxygen to the brain, causing CO intoxication, and lack of reasoning.
How many grams are in 44.8 liters of nitrogen gas, n2?
a) 56g
b) 27g
c) 36g
d) 112g
Answer:
56 grams
Explanation:
44.8 L = 2 mol
Diatomic nitrogen has a formula mass of 28 g/mol, so 2 moles is 56 grams.
a) 56g
Calculation:At STP,
22.4 L of N₂ = 1 mol
We have given 44.8 L of N₂, therefore,
44.8 L of N₂ = [tex]\frac{44.8}{22.4}[/tex]
= [tex]2[/tex] mol
We know that,
1 mol of N₂ = 28 g
Hence,
2 mol of N₂ = 28 × 2
= 56g
Hence, there are 56 g of N₂ in 44.8 L of nitrogen gas.
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Naturally occuring element X exists in three isotopic forms: X-28 (27.730 amu, 60.58% abundance), X-29 (28.841 amu, 18.35% abundance), and X-32 (31.321 amu, 21.07% abundance). Calculate the average atomic weight of X. Please enter your answer to 4 significant figures.
The Average atomic weight of X is 28.7amu
Isotopes are atoms with the same number of protons but differing numbers of neutrons.
Different isotopes have various atomic masses.
The proportion of atoms with a particular atomic mass that can be found in a naturally occurring sample of an element is known as the relative abundance of an isotope.
An element's average atomic mass is computed as a weighted average by multiplying the relative abundances of its isotopes by their respective atomic masses, then adding the resulting products.
Using mass spectrometry, it is possible to determine the relative abundance of each isotope.
The atomic weight of the element will be a weighted average of the isotopes based on the relative abundance:
(27.730 x 0.6058) + (28.841 x 0.1835) + (31.321 x 0.2107) = 16.7988 + 5.2923+ 6.599 = 28.690 = 28.7 amu.
Average atomic weight of X is 28.7amu
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Complete the table below by writing the symbols for the cation and anion that make up each ionic compound.
The ions are as follows;
As2O3 - As^3+, O^2-MnS - Mn^2+, S^2-VCl3 - V^3+, Cl^-NiF2 - Ni^2+, F^-What is a cation and an anion?A cation is a positive ion while an anion is a negative ion. Ionic compounds are composed o cations and anions.
The anions and cations in the ionic compounds in the table are shown below;
As2O3 - As^3+, O^2-MnS - Mn^2+, S^2-VCl3 - V^3+, Cl^-NiF2 - Ni^2+, F^-Learn more about cations and anions:https://brainly.com/question/4933048
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What is the freezing point depression when sugar is dissolved in water to make a 0.50 molal solution?
The freezing point depression when sugar is dissolved in water to make a 0.50 molal solution is 0.93 °C.
What is the freezing point depression of water when sugar is added?The freezing point depression of a solvent is calculated using the formula below:
ΔT = -iKfmWhere:
i = Van’t Hoff factorKf = Freezing point constant of solvent (1.86°C/m for water)m = Molality of SolventThe Van’t Hoff factor for sugar = 1
m = 0.50
Substituting the values:
ΔTf = −1 ×1.86 × 0.50m = − 0.93°C
In conclusion, the freezing point of water is depressed by 0.93 °C.
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What is the balanced form of the chemical equation shown below?
N₂(g) + H₂(g) → NH3(g)
OA. N₂(g) + 3H₂(g) → 2NH3(g)
OB. N₂(g) + H₂(g) → 2NH(g)
OC. N₂(g) + H₂(g) →
NH3(g)
OD. N₂(g) + H₂(g) → 2NH3(g)
The balanced form of the chemical equation shown is N₂(g) + 3H₂(g) → 2NH3(g) (option A).
What is a balanced equation?A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation is the same.
According to this question, the chemical equation between nitrogen and hydrogen is given as follows: N₂(g) + H₂(g) → NH3(g)
The balanced form of the chemical equation shown is N₂(g) + 3H₂(g) → 2NH3(g).
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Prepare a project report on the three state of matter.
detailed answer plss
Answer:
Matter is all around you. All atoms and compounds are made up of very small pieces of matter. Such atoms continue to build the everyday things you see and touch. Matter is defined as anything that has mass (it has volume) and takes up space.
Explanation:
The three states of matter are the three distinct physical forms which matter can take in most environments: solid, liquid , and gas. Other states, such as plasma, Bose-Einstein condensate, and neutron stars, may be present in extreme environments.
L 8.1.4 Quiz: Types of Chemical Reactions
Question 1 of 10
Which products are formed when ethane (C₂H6) undergoes combustion?
OA. H₂O, CO₂, and 02
OB. H₂ and CO₂
OC. H₂0 and CO₂
OD. H₂O and C
SUBMIT
Answer:
C.) H₂O and CO₂
Explanation:
A product is what is created during reaction (the things on the right side of the chemical equation). A combustion reaction always forms water, carbon dioxide, and heat. In this case, the equation looks like this:
2 C₂H₆ +7 O₂ ----> 6 H₂O + 4 CO₂
0 clue what is going on. pls help
Answer:
same question can I copy the answer
Explanation:
haha sorry
Using the periodic table, choose the more reactive non-metal.
S or As
Answer:
S
Explanation:
Reactivity goes UP as you go to the right or upward on the periodic table
S is above and to the right of As so we would expect it to be the more reactive of the two.
If the volume of the original sample in Part A ( P1 = 242 torr , V1 = 27.0 L ) changes to 80.0 L , without a change in the temperature or moles of gas molecules, what is the new pressure, P2 ? Express your answer with the appropriate units.
The new pressure is 81.675 torr
Since temperature and moles are held constant, we use Boyle's Law:
A gas law known as Boyle's law asserts that a gas's pressure is inversely proportional to its volume when it is held at a fixed temperature and of a given mass.
To put it another way, as long as the temperature and volume of the gas remain constant, the pressure and volume of the gas are inversely proportional to one another.
The Anglo-Irish chemist Robert Boyle proposed Boyle's law in the year 1662.
P1V1=P2V2. Simply plug in your values. The units can remain in torr. Converting to atmospheres is not needed.
(242 torr)(27.0 L)=P2(80.0 L)
P2=[(242)(27)]/80 = 81.675 torr
Hence The new pressure is 81.675 torr
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A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is 16.84 nm. What is the total width of a crystal in
millimeters 105 molecules across? Write your answer as a decimal.
Answer:
u can just multiply 1
Explanation:
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How many low tides happen at a given coast in any 24-hour period?
Answer here
What does the absorption spectrum of an atom show?
The absorption spectrum of an atom shows pattern of dark lines or bands attained by transmitting absorbed light beam into the spectroscope.
What does an atom's absorption spectrum look like?By sending an absorbed light beam into a spectroscope, one can create a pattern of black lines or bands.
The vapors or solution of a substance in the discharge tube are illuminated by a white light. After passing through a spectroscope, the transmitted light produces a spectrum of black lines at specific wavelengths. These shady lines match the light radiation wavelengths that the material has absorbed.
An atom, ion, or molecule absorbs photons with energies equal to the energy difference between the two states when it transitions from one to the other. An absorbance spectrum that depicts the intensity of emission as a function of wavelength is the end result.
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An ideal gas at 20 degrees centigrade has a volume of 12 liters and a pressure of 15 atmospheres. Its temperature is raised to 35 degrees centigrade and compressed to a volume of 8.5 liters. Calculate the final pressure of the gas. (2 pts.)
P 15 atm
V₁ = 12x103 m3 -3 3 V₁ = 12x10 m" T₁ = 25°c T= 28815 K
P₁ = 1.52x10 Pa
Now, Finel quantities, T₂ = 35°C = 308.15 °K
V2= 851 = -3 3
Now
by ideal gas equation
P2Y2 T2
= PV, T2
1152 X106 x 12x16 3 x 308115 8,5×103 x 288,15 = Pa
=
21294×10 Pa
P₂ = 21264 Atm
final
pressure will be
21264 Adm.
Please check the attached file for a brief answer.
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Given 1L of a 1.0 M solution of H3PO4, how many moles of NaOH are required to make a buffer with a pH of 12.4
Moles of NaOH required to make a buffer with a pH of 12.4 will be 1.18.
Calculation of moles:
1L of 1M solution of [tex]H_3PO_4[/tex]
Buffer pH= 12.4
As we know
pH + pOH= 14
pOH= 14 - pH
pOH= 14 - 12.4
pOH= 1.6
Also,
[tex]pOH= -log[OH^-]\\[/tex]
By calculating concentration of Hydroxide ion, we can calculate the moles of NaOH required.
[tex]1.6= -log[OH^-]\\[/tex]
Taking antilog, we get
[tex][OH^-]= 1.18M[/tex]
As the volume of the solution is 1L.
Molarity is number of moles of solute in 1L of the solution.
Therefore, moles of [tex][OH^-]= 1.18[/tex]
So, number of moles of NaOH required will be 1.18.
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Advances in medical technology and healthcare have increased the life expectancy of people around the world. what negative effect has this also influenced?
The negative effect of technology on Healthcare:
Impersonal treatment, harmful health impacts, higher expenditures, the potential for overuse, and privacy violations are just a few of the negative effects of medical technology.
Medical technology:
It refers to all technological tools or apparatus utilized to protect human life. Medical equipment such as an insulin pump, a wireless brain sensor, a blood glucose meter, a digital thermometer, pulse oximeters, smart inhalers, etc the tools which had helped patients receive better medical treatment.
Effects of Medical technology:
Medical technology, nevertheless, can potentially cause issues for the patient like:
1. Impersonal treatment: When a healthcare professional uses technology too frequently, they could spend less time getting to know the patient as a person and more time dealing with the equipment.
2. Harmful health impacts: Surgery, radiation therapy, and chemotherapy are a few examples of treatments that might be advantageous but also have risks.
3. Higher expenditures: Due to the research and marketing required to bring new technologies to market and to generate a profit for their creators and manufacturers, they may result in increased patient costs.
4. Potential for overuse: The use of a technology or new product by a medical professional may be encouraged by the manufacturer, regardless of whether it is in the patient's best interest.
5. Privacy violation: Electronic medical records (EMR), for example, collect and manage patient information. This new technology is convenient, but it also has the potential to be misused, compromising patient privacy and personal data.
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PLS HELP!!! In the reaction of calcium and oxygen to
form calcium oxide, shown below, what
are the reactants? Select all that apply
2
Ca + O
2
->
2
CaO
Answer:
Ca and O₂
Explanation:
In the chemical reaction producing calcium oxide (CaO), the reactants are Ca and O₂. The reactants are the substances that are reacted to make the new substance(s). The products are the new substances created from the reaction. The reactants are generally to the left of the arrow and products are to the right of the arrow.
A student measures the molar solubility of silver carbonate in a water solution to be M. Based on her data, the solubility product constant for this compound is
A student measures the molar solubility of silver carbonate in a water solution to be 1.24 × 10⁻⁴ M. Based on her data, the solubility product constant for this compound is 7.63 × 10⁻¹² M³.
What is Stoichiometry ?Stoichiometry helps us use the balanced chemical equation to measure quantitative relationships and it is to calculate the amounts of products and reactants that are given in a reaction.
Silver carbonate dissociates as follows
Ag₂CO₃ (s) ⇄ 2Ag⁺ (aq) + CO₃⁻² (aq)
How to find the Solubility Product Constant ?To find the solubility product constant use the expression
[tex]K_{sp} = [A^{+}]^{a} [B^{-}]^{b}[/tex]
where
[tex]K_{sp}[/tex] = Solubility product constant
A⁺ = cation in an aqueous solution
B⁻ = anion in an aqueous solution
a, b = concentration of a and b
Molar Solubility (S) = 1.24 × 10⁻⁴ M
Solubility, Ag⁺ = 2S
Solubility, CO₃⁻² = S
Put the value in above expression, we get
[tex]K_{sp} = [A^{+}]^{a} [B^{-}]^{b}[/tex]
= [Ag⁺]² [CO₃⁻²]¹
= [2S]² [S]¹
= 4S² × S
= 4S³
= 4 × ( 1.24 × 10⁻⁴ M)³
= 7.63 × 10⁻¹² M³
Thus from the above conclusion we can say that A student measures the molar solubility of silver carbonate in a water solution to be 1.24 × 10⁻⁴ M. Based on her data, the solubility product constant for this compound is 7.63 × 10⁻¹² M³.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: A student measures the molar solubility of silver carbonate in a water solution to be 1.24 × 10⁻⁴ M. Based on her data, the solubility product constant for this compound is ..........
1. Ethanol and 2,6-dimethylphenol both have hydroxyl groups that can be deprotonated by a base. Why does ethanol act as a solvent but not as a nucleophile under the conditions used in this experiment
Anions are solvated in protic hydrogen-bonding solvents (such as ethanol). Consequently, nucleophiles are less reactive. Since soft nucleophiles are less strongly solvated than hard nucleophiles, these solvents boost the relative reactivity of soft anions.
Ethanol is either a nucleophile or a base.The ethanol is a base Because carbocation is an extremely reactive species, a base or nucleophile as weak as ethanol can replace or remove it. SN1 and E1 would not be conceivable without the carbocation or a strong departing group.
How do solvents impact anionic nucleophile's reactivity?In polar aprotic solvents, nucleophilic substitution reactions of anionic nucleophiles often proceed more quickly. The normal relative reactivity order in such solvents (like DMSO)is Anions are solvated in protic hydrogen-bonding solvents (such as ethanol). Consequently, nucleophiles are less reactive.
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Dna is made out of two strands of nucleotides that form a twisted ladder shape called a double helix. all of the following are part of a nucleotide except; a. deoxyribose sugar b. phosphate c. chromosomes d. nitrogen bases
Answer:
C.) Chromosomes
Explanation:
Nucleotides are made up of three parts: a deoxyribose sugar, a phosphate, and a nitrogen base.
Chromosomes are long, condensed strands of DNA.
Calculate the volume of liquid in the tank sketched below. Give your answer in liters, and round to the nearest 0.1 L.
Answer:
1.3 L
Explanation:
The volume of a rectangular cube can be calculated using the following formula:
Volume (L) = length (cm) x width (cm) x height (cm)
Keep in mind that 1 L = 1,000 cm³.
Before you can plug the values into the equation, you need to make sure they all have the same unit. Since the length is in meters (m), you need to first convert it to centimeters.
1 meter = 100 cm
0.159 m 100 cm
--------------- x ---------------- = 15.9 cm
1 m
Now, you can solve for the volume. To find the answer is the unit liters, you need to divide the volume by 1,000.
Volume = l x w x h
Volume = 15.9 cm x 10.5 cm x 7.7 cm
Volume = 1,285.5 cm³
Volume = 1.2855 L ------> Volume = 1.3 L
asap
1.)the number of atoms in 2.57 grams of carbon
4.)the number of atoms in 108 grams of chlorine gas (Cl2 (g))
3.)the mass of 1.00 X 10^20 atoms of sodium
Answer: See below
Explanation:
1.
[tex]\text{2.57 grams C} \, \, \cdot \frac{1 \text{mol C}}{12.011 \text{g}} \cdot \frac{6.022 \cdot 10^{23} \text{atoms}}{1 \text{mol}} = 1.29 \cdot 10^{23} \text{ atoms of C}[/tex]
2.
[tex]108 \text{ grams Cl}_2} \,\, \cdot \frac{2 \text{ Cl atoms}}{1 \text{Cl}_2 \text{ molecule}} \cdot \frac{1 \text{ mol Cl}}{35.453 \text{g}} \cdot \frac{6.022 \cdot 10^{23} \text{atoms}}{1 \text{ mol Cl}} = 3.67 \cdot 10^{24} \text{ atoms of Cl}[/tex]
3.
[tex]1.00 \,\cdot 10^{20} \text{ atoms Na } \cdot \frac{1 \text{mol Na}}{6.022 \cdot 10^{23} \text{ atoms}} \cdot \frac{22.990 \text{g}}{1 \text{mol Na}} = 0.00382 \text{ grams Na}[/tex]