When 216.59 g of HgO completely reacts, 16.00 g of O2 will be produced.
The oxygen produced
The balanced chemical equation for the reaction:
2HgO(s) → 2Hg(l) + O2(g)
states that 2 moles of HgO will produce 1 mole of O2.
We can use the molar mass of HgO and the mole ratio of HgO to O2 to calculate the mass of O2 produced from a given mass of HgO.
The molar mass of HgO is 216.59 g/mol (200.59 g/mol for Hg + 16.00 g/mol for O).
So, 1 mole of HgO has a mass of 216.59 g.
According to the balanced equation, 2 moles of HgO produce 1 mole of O2.
Therefore, 1 mole of O2 has a mass of 32.00 g.
Using stoichiometry, we can calculate the mass of O2 produced when a certain mass of HgO reacts completely.
For example, if we start with 216.59 g of HgO (1 mole), then the amount of O2 produced will be 0.5 moles (1 mole of O2 for every 2 moles of HgO), which is equivalent to 16.00 g of O2 (0.5 moles of O2 x 32.00 g/mol).
So, when 216.59 g of HgO completely reacts, 16.00 g of O2 will be produced.
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Plants go through seasonal changes from summer to fall because temperatures ___________. A: begin to cool daylight hours decrease.
B: begin to cool and daylight hours in increase.
C: warm up in daylight hours decrease.
Or D: warm up, and daylight hours increase.
30 POINTS IF YOU ANSWER THIS QUESTION ALSO, I HAVE 15 MINS
Also, there’s no science so I picked “ chemistry”
A: begin to cool and daylight hours decrease.
Plants go through seasonal changes from summer to fall because of the changes in temperature and the length of daylight hours. As summer ends and fall begins, temperatures begin to cool down and the days become shorter. This change in temperature and daylight hours triggers physiological changes in plants, such as the slowing down of growth and the production of pigments like anthocyanins, which give leaves their characteristic red and orange colors in the fall. These changes allow the plant to prepare for the colder winter months and conserve energy for the upcoming spring growth season.
Answer:
a. begin to cool and daylight hours decrease
hope this helps ;)
A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the audience hears the sound.
a. The frequency or amplitude of the sound waves will not change.
b. Sound waves that the audience hears are electromagnetic waves.
c. Hearing the sound does not change the wave type.
d. The frequency or amplitude of the sound waves could change as the song plays.
e. Hearing the sound waves changes the wave from mechanical wave to an electromagnetic wave.
f. Hearing the sound waves changes the wave from an electromagnetic wave to a mechanical wave.
g. Sound waves that the audience hears are mechanical waves.
Answer:
a. The frequency or amplitude of the sound waves will not change.
d. The frequency or amplitude of the sound waves could change as the song plays.
g. Sound waves that the audience hears are mechanical waves.
These are the true statements.
others are false.
b. Sound waves that the audience hears are not electromagnetic waves. Sound waves are a type of mechanical wave, which means that they require a medium to travel through, and in this case, the medium is air.
c. Hearing the sound does not change the wave type. The wave type remains a mechanical wave, even after it reaches the audience's ears.
e. and f. are also not true, as the process of hearing sound does not change the wave type from mechanical to electromagnetic or vice versa.
Explain how a raccoon is helping the environment when it eats the fruit of a plant.
a
The raccoon is getting energy from the fruit.
b
The raccoon is helping to spread the seeds of the plant.
c
The raccoon is cleaning up fruit that would pollute the ground.
d
The raccoon is preventing the reproduction of the plant by eating the fruit.
choice b is the right response. When the raccoon consumes the fruit, it aids in the dispersal of the plant's seeds.
The seeds that the raccoon consumes along with the fruit move through its digestive tract and are eventually eliminated in the raccoon's feces.
When the feces are left behind, they can act as a source of nutrition for the seeds, promoting their growth and allowing new plants to take root. The plant's chances of reproducing and sustaining a healthy population are increased thanks to the raccoon's assistance in dispersing the seeds.
A raccoon consumes both the fruit's seeds and the fruit itself when it consumes a plant's fruit. The seeds are subsequently digested by the raccoon, which is beneficial for the seeds since it breaks down the tough seed coatings and supplies nutrients that aid in the growth of the seed. The raccoon finally excretes the seeds in its feces, which are then dumped in other parts of the habitat.
Plants need this mechanism of seed dispersal because it promotes genetic variation and can result in the formation of new plant populations in various locations.
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Give at least 1 important aldehyde or ketone compound and describe its significant uses.
One important aldehyde is formaldehyde (HCHO), which has many significant uses. It is used as a preservative in medical laboratories and mortuaries, as well as in the manufacture of disinfectants, cosmetics, and fertilizers.
What are the significance of formaldehyde?Formaldehyde is a crucial component in the production of urea-formaldehyde resins, which are widely used in the manufacture of particleboard and other composite wood products. These resins are also used as adhesives in the production of plywood, medium-density fiberboard (MDF), and oriented strand board (OSB).
Formaldehyde has a variety of medical applications. It is used in the preparation of vaccines, as well as in the production of surgical implants and other medical devices. Formaldehyde is also used in the production of some medications, including certain types of antibiotics.
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A new band sensation is playing a concert and recording it for a live album to be released this summer. Create a sequence chain showing the flow of energy changes that occur from the time the sound is created until the audience hears the sound.
Answer:
Sound is Produced → Speaker → Wave Display → Microphone → Wave Display → Audience Hears Sound
Explanation:
Here is a more detailed explanation of each step in the sequence chain:
Sound is Produced: The sound is initially created by the band on stage. The sound is produced through the vibrations of musical instruments or the vocal cords of the singer.Speaker: The sound waves produced by the band travel through the air as mechanical waves until they reach the speakers on the stage.Wave Display: The sound waves are displayed on a wave display, which is a device that shows the shape, frequency, and amplitude of the waves. This display helps the sound engineers to monitor and adjust the sound to ensure that it is of high quality.Microphone: The sound waves then pass through the microphone, which converts the mechanical waves into electrical signals. These signals are then transmitted to the mixing console.Wave Display: The electrical signals are displayed again on the wave display at the mixing console, allowing the sound engineers to make further adjustments to the sound quality, such as adjusting the levels and frequencies.Audience Hears Sound: Finally, the electrical signals are transmitted to the amplifiers, which amplify the electrical signals and transmit them to the speakers located throughout the venue. The sound waves produced by the speakers propagate through the air and reach the audience, who hears the sound.A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the microphone records the sound.
a. The microphone changes the wave from an electromagnetic wave to a mechanical wave.
b. The recorded waves are electromagnetic waves.
c. The recorded waves are mechanical waves.
d. The microphone changes the wave from mechanical wave to an electromagnetic wave.
e. The microphone does not change the wave type.
f. The frequency or amplitude of the waves will not change in the microphone.
g. The frequency or amplitude of the waves will change in the microphone.
Answer:
c. The recorded waves are mechanical waves.
e. The microphone does not change the wave type.
g. The frequency or amplitude of the waves will change in the microphone.
These statements are true. The microphone records the sound waves as mechanical waves, which require a medium to travel through, such as air or water. The microphone does not change the type of wave from mechanical to electromagnetic, or vice versa. The frequency and amplitude of the sound waves will change as they pass through the microphone, depending on the characteristics of the source producing the sound.
1. Using a graduated cylinder, measure out 50 mL water (H2O) and pour it in a 100 mL beaker 2. Using a balance, measure out 5 g of glucose (C6H12O6) 3. Pour the 5 g of glucose into the 50 mL of water 4. Stir the contents of the beaker using a glass rod 5. Using tweezers, count out 15 pieces of iron (Fe) filings 6. Add the iron filings to the beaker 7. Stir the contents of the beaker using a glass rod During which step(s) was the student handling a pure substance? Responses A Steps 1 and 3Steps 1 and 3 B Step 4 onlyStep 4 only C Steps 1, 2, and 5Steps 1, 2, and 5 D Steps 6 and 7Steps 6 and 7
The step during which the student handling pure substance is : B.) Step 4 only.
During which step was the student handling pure substance?In step 4, student added 5 grams of glucose to 50 mL of water, which is a pure substance. Glucose is a compound with the chemical formula C₆H₁₂O₆, and it is a pure substance because it consists of only one type of molecule.
In steps 1, 2, and 5, student was handling water, glucose, and iron filings respectively, but these are not pure substances in those steps because they are mixed with other substances or impurities.
In steps 6 and 7, the student added iron filings to beaker and stirred the mixture, but iron filings are not pure substance either because they may contain impurities or other metals in addition to iron.
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O Macmillan Learning
What is the IUPAC name for the compound shown?
IUPAC name:
The IUPAC name for this compound is 2,2-methyl-3ethylhexane.
What is a compound's IUPAC name?The IUPAC terminology is based on the longest chain of carbons joined by a single bond, whether it be a continuous chain or a ring. Prefixes or suffixes are used to denote any modifications, regardless of whether they include multiple bonds or atoms other than carbon and hydrogen.
Who are you according to IUPAC?The International Union of Pure and Applied Chemistry's (IUPAC) suggested system for naming organic chemical compounds is used in chemical nomenclature (IUPAC). The Organic Chemistry Nomenclature publishes. It is the organisation most renowned for its work establishing nomenclature standards in chemistry and other scientific disciplines.
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A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for band producing sound.
a. The produced sound waves are electromagnetic waves.
b. Producing sound changes the wave from an electromagnetic wave to a mechanical wave.
c. The frequency or amplitude of the sound waves will change if the singer varies their voice.
d. The produced sound waves are mechanical waves.
e. Producing sound changes the wave from mechanical wave to an electromagnetic wave.
f. Producing the sound does not change the wave type.
g. The frequency or amplitude of the sound waves will not change.
Answer:
c. The frequency or amplitude of the sound waves will change if the singer varies their voice.
d. The produced sound waves are mechanical waves.
f. Producing the sound does not change the wave type.
g. The frequency or amplitude of the sound waves will not change
These statements are true. Sound waves are mechanical waves, meaning they require a medium to travel through, such as air or water. Producing sound involves creating vibrations in the medium, which then propagate as sound waves. The frequency and amplitude of the sound waves will change depending on the characteristics of the source producing the sound. However, producing sound does not change the type of wave from mechanical to electromagnetic, or vice versa
Write the equation to find the distance from speed and time
If you shout into the Grand Canyon, your voice travels at the speed of sound (340 m/s) to the bottom of the canyon and back, and you hear an echo. How deep is the Grand Canyon at a spot where you can hear your echo 5.2 seconds after you shout? Please SHOW YOUR WORK and INCLUDE UNITS!
The depth of the Grand Canyon at the spot where you can hear your echo 5.2 seconds after you shout is 884 meters.
The equation to find the distance from speed and time is:
distance = speed x time
In this problem, we are given the speed of sound (340 m/s) and the time it takes for the sound to travel to the bottom of the canyon and back (5.2 s). To find the distance from the top of the canyon to the bottom, we can use the above equation:
distance = speed x time = 340 m/s x 5.2 s = 1768 m
However, this distance represents the total distance traveled by the sound wave, which includes the distance from the top of the canyon to the bottom and back to the top. Since we are only interested in the depth of the canyon, we need to divide the total distance by two:
depth of canyon = distance / 2 = 1768 m / 2 = 884 m
Therefore, the depth of the Grand Canyon at the spot where you can hear your echo 5.2 seconds after you shout is 884 meters.
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For a particular reaction at 121.3 °C, Δ=53.29 kJ/mol , and Δ=623.51 J/(mol⋅K) . Calculate ΔG for this reaction at −79.6 °C.
At -79.6 °C, the standard free energy change for this reaction is -67.24 kJ/mol.
How to determine standard free energy change?Use the following equation to calculate the standard free energy change at a different temperature:
ΔG = ΔH - TΔS
where ΔH = enthalpy change, ΔS = entropy change, and T = temperature in Kelvin.
Given:
ΔH = 53.29 kJ/mol
ΔS = 623.51 J/(mol⋅K)
T = -79.6 + 273.15 K = 193.55 K
First, convert ΔH from kJ/mol to J/mol:
ΔH = 53.29 × 10³ J/mol
Next, convert ΔS from J/(mol⋅K) to kJ/(mol⋅K):
ΔS = 623.51 J/(mol⋅K) ÷ 1000 = 0.62351 kJ/(mol⋅K)
Plug in the values:
ΔG = (53.29 × 10³ J/mol) - (193.55 K × 0.62351 kJ/(mol⋅K))
ΔG = 53.29 kJ/mol - 120.53 kJ/mol
ΔG = -67.24 kJ/mol
Therefore, the standard free energy change for this reaction at -79.6 °C is -67.24 kJ/mol.
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List all possible values of the magnetic quantum number ml for a 1s electron.
The magnetic quantum number (ml) represents the orientation of the orbital in three-dimensional space the only possible value of the magnetic quantum number ml for a 1s electron is 0.
What is a quantum ?Quantum is the smallest possible unit of a physical quantity, such as energy or momentum. It is a fundamental concept in quantum mechanics, which is the branch of physics that deals with the behavior of matter and energy at the atomic and subatomic level.
The idea of quantization was first proposed by Max Planck in 1900, when he discovered that energy is emitted and absorbed in discrete units called "quanta" when studying the behavior of light and blackbody radiation. Later, this idea was extended to other physical quantities, such as the momentum and position of particles.
According to quantum mechanics, the behavior of particles and systems cannot be fully described using classical mechanics, which assumes that particles have definite positions and velocities at all times. Instead, the behavior of particles and systems is described using wave functions, which represent the probability of finding a particle at a given position and time.
The principles of quantum mechanics have important applications in many areas of physics, including atomic and molecular physics, condensed matter physics, and particle physics. They are also the basis.
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How many grams of water would be formed from 96.0 g NH3 in a reaction represented by the balanced equation below. 4 NH3(g) + 3 O₂(g) → 2 N₂(g) + 6 H₂O(l)
Answer:
4 NH3(0) + 3 O2(g) → 2 N2(g) + 6H20() ... How many grams of water would be formed from 96.0 g NH3 in a reaction represented by the balanced equation below.
Missing: 6 H₂O( l)
Explanation:
How many grams are in 1.48x x 10
The answer is 14.8 grams, which is option (d).
How many grammes of Sodium chloride are there in 7.8 moles?Therefore keep in mind that we are using molecular masses here. Therefore, 58 0.5 g of sodium chloride and one more will be obtained. Divide the mass of Sodium chloride by its molar mass to determine the number of moles: 0.941 moles are equal to 55 g/58.44 g/mol. 55 g of Sodium chloride is therefore equal to 0.941 moles of Sodium chloride.
How much is 1 gramme?A unit of mass is a gramme. One kilogramme weighs one thousandth of a gramme. The weight of a cube of pure water that is one centimetre in size and four degrees Celsius was the original definition of a gramme. The gramme has the sign g.
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Question:
How many grams are in 1.48 x10⁷μg?
1.48 x103³
1.48 x10¹³
1.48
14.8
none of the above
Faculty of Science
Department of Chemistry
8/2019 SECOND SEMESTER EXAMINATIONS
351 STATISTICAL MECHANICS AND THERMODYNAMICS
INSTRUCTIONS: Answer any FOUR questions.
Pluck's constant, h: 6.26 x 1034 J.S
zmann constant, k: 1.38 x 10 JK
nic mass Unit, amu: 1.661 x 10-kg
Nag
3Higi
C₂ (N₂) = 27.9 +0.00418T JK mol
C₂ (H₂) = 29.6+0.00231T JK 'mol
C₂ (NH) 29.9+0.00261T JK 'mol"¹
Gas constant, R: 8.314 JK mol
Avogadro constant, L: 6.022 x 10 mol
Speed of light, C: 2.998 x 10" ms¹¹
1. (a) Deduce the translational, rotational and vibrational mode of motion for the following
molecules: (i) NHs (ii) CO₂ (iii) CH.
(b) Calculate the enthalpy change at 800 °C for the reaction:
2NH
اله
November, 2019
UNIT: 4
Time allowed: 3hrs
All 92.2 kJ/mol
=
2. (a) Sate the equipartition law of energy.
(b) Apply the classical theory in calculating the expected heat capacity at constant pressure
for H₂ and Cl2 molecule given that the experimental value for H₂ is 28.86 JK 'mol and that
of Cle is 34.51 JK 'mol Explain the variation in these values.
(b) What will be the C₂ for a monoatomic gas?
(a) (i) NH3: Translational, rotational, and vibrational modes of motion.
(ii) CO2: Translational and vibrational mode of motion.
(iii) CH4: Translational, rotational, and vibrational modes of motion.
What is a Vibrational Mode of Motion?This simply refers to the oscillatory movement of a physical system around its equilibrium position. This phenomenon is characterized by a complex interplay of forces and energy transfer mechanisms, which can lead to a wide range of intriguing dynamical behaviors.
The part b of the first question, the reaction given is incomplete, and the products are missing. Please provide the complete balanced chemical equation for the reaction so that the enthalpy change can be calculated.
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Methamphetamine is a notorious street drug. One synthesis involves reductive amination of benzyl methyl ketone with methylamine. Indicate the reactions and give the structure of methamphetamine
Methamphetamine is an amphetamine that stimulates the central nervous system (CNS).
Methamphetamine works by facilitating the release of catecholamines from brain nerve terminals, including noradrenaline, dopamine, and serotonin, as well as by inhibiting their uptake. As a result, the concentration of these neurotransmitters in the synaptic cleft rises, stimulating postsynaptic receptors more intensely.
The catalytic reduction of 1-phenyl-2-propanone (P-2-P, benzyl methyl ketone, BMK, or phenylacetone) in the presence of ammonia or methylamine is the fundamental reaction in all processes used to create methamphetamine. The Leuckart method (non-metallic reduction) and catalytic metal reduction are currently the most widely used reduction techniques.
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Can someone do this for me pls
1) Decomposition
2) Double replacement
3) Single replacement
4) Synthesis reaction
5) Single replacement
6) Synthesis reaction
7) Synthesis reaction
8) Single replacement
9) Double replacement
10) Synthesis reaction
11) Synthesis reaction
What is the type of the reaction?A chemical reaction is a process that results in the conversion of one group of chemical compounds into another. In order to create a new material or substances, chemical bonds between atoms, ions, or molecules must be broken and formed. Reactants are the substances that start a chemical reaction, while products are the substances that come out of the process.
The law of conservation of mass requires that during a chemical process, the total amount of matter remains constant.
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For the reaction A+2B→C 5 moles of A and 8 moles of B produce
A student wants to help preserve coral reefs which field of study would be most useful ?
For a student wishing to contribute to the preservation of coral reefs, oceanography would be the most beneficial topic of study because it is ocean-focused.
What are coral reefs?An underwater environment known as a coral reef is characterized by corals that construct reefs. Coral polyp colonies are bound together by calcium carbonate to build reefs. Stony corals, whose polyps gather together, make up the majority of coral reefs.
Coral reefs offer chances for recreation, serve as a barrier against erosion and storm damage, and support local economies. They are also a source of fresh medications and food. More than 500 million people rely on reefs for safety, income, and food.
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An unidentified compound was analyzed and found to contain 29.84 g Na, 67.49 g Cr and 72.67
g of O. Calculate the empirical formula of the compound.
Sodium dichromate is the empirical formula for the chemical.
Benzene formula: what is it?An allotrope of carbon with the chemical formula carbon 6, benzotriyne or cyclo[6]carbon is a hypothetical molecule. Six carbon atoms form the molecule's ring, which is joined by alternating triple and single bonds.
We must identify the compound's simplest whole-number atom ratio in order to obtain the empirical formula. To begin, we can convert the masses of each element to moles as follows:
moles of sodium = 29.84 g / 22.99 g/mol = 1.299 mol
moles of creatinine = 67.49 g / 52.00 g/mol = 1.298 mol
moles of oxygen = 72.67 g / 16.00 g/mol = 4.542 mol
sodium.creatinine.oxygen = 1.299 mol / 1.298 mol : 1.298 mol / 1.298 mol : 4.542 mol / 1.298 mol
sodium.creatinine.oxygen = 1.001 : 1.001 : 3.500
sodium.creatinine.oxygen = 1001 : 1001 : 3500
sodium.creatinine.oxygen = 1001/GCF : 1001/GCF : 3500/GCF
sodium.creatinine.oxygen = 143 : 143 : 500.
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What is 99+49x901/1098
Answer:
139.20856102 this is thee answer
Answer:
139,18
Explanation:
How many grams of H2O will be produced by the combustion of 16 grams of C2H4?
Answer:
The balanced chemical equation for the combustion of C2H4 (ethylene) is:
C2H4 + 3 O2 → 2 CO2 + 2 H2O
From the balanced chemical equation, we can see that 1 mole of C2H4 reacts to produce 2 moles of H2O.
First, we need to convert the given mass of C2H4 to moles using its molar mass. The molar mass of C2H4 is:
2(12.01 g/mol) + 4(1.01 g/mol) = 28.05 g/mol
Now, we can calculate the moles of C2H4:
moles of C2H4 = mass of C2H4 / molar mass of C2H4
moles of C2H4 = 16 g / 28.05 g/mol
moles of C2H4 ≈ 0.570 mol (rounded to three decimal places)
According to the balanced chemical equation, 1 mole of C2H4 produces 2 moles of H2O.
moles of H2O = 2 * moles of C2H4
moles of H2O = 2 * 0.570 mol
moles of H2O ≈ 1.140 mol (rounded to three decimal places)
Finally, we can convert the moles of H2O to grams using the molar mass of water (H2O), which is 18.015 g/mol.
mass of H2O = moles of H2O * molar mass of H2O
mass of H2O = 1.140 mol * 18.015 g/mol
mass of H2O ≈ 20.53 g (rounded to two decimal places)
So, approximately 20.53 grams of H2O will be produced by the combustion of 16 grams of C2H4.
How many grams of NO will be produced, if 18.93g of H2O are also produced in the reaction below?
If 18.93g of H₂O are also produced in the reaction, then 21.04 grams of NO will be produced.
What is meant by reaction?Reaction is such a process that involves transformation of one or more substances into a new substances.
Assuming NH₃ is limiting reagent, let's calculate the amount of NH₃ from the given mass of H₂O produced:
Molar mass of H₂O is 18.015 g/mol;
So, 18.93 g H₂O ÷18.015 g/mol H2O= 1.0515 mol H₂O
As the mole ratio of NH₃ to H2O is 4:6, we can calculate the number of moles of NH₃ :
1.0515 mol H₂O × (4 mol NH₃ / 6 mol H₂O) = 0.701 mol NH₃
0.701 mol NH₃ × (4 mol NO / 4 mol NH₃ ) = 0.701 mol NO
0.701 mol NO × 30.01 g/mol NO = 21.04 g NO
Therefore, 21.04 grams of NO will be produced.
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If 100.0 moles of H and 40.0 moles of O, react to produce water, which one is the limiting reactant in the
reaction below?
2 H, (g) + 02 (g) - > 2 H20(g)
If 100.0 moles of H₂ and 40.0 moles of O₂, react to produce water, H₂ one is the limiting reactant.
What is limiting reactant?When a chemical reaction is complete, the limiting reagent—also known as the limiting reactant or limiting agent—is the reactant that has been completely consumed. Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained. Excess reagents or excess reactants are any reagents that are present in amounts greater than those necessary to cause a reaction with the limiting reagent.
Since the amount of product produced when the limiting reagent interacts entirely is defined as the theoretical yield, the limiting reagent must be identified in order to calculate the percentage yield of a reaction.
The limiting reactant is H₂ because it is the reactant that controls the amount of product produced. When 100 moles of H₂ and 40 moles of O₂ react, all of the H₂ will have been consumed, but there will still be O₂ left over. This means that the reaction was limited by the H₂ and that is the limiting reactant. The solution can be determined by using the following equation:
n(H₂) = 100.0 moles
n(O₂) = 40.0 moles
n(H₂) / (n(O₂) / 2) = ratio of H₂ to O₂
100.0 moles / (40.0 moles / 2) = 5.0
Since the ratio of H₂ to O₂ is 5.0, this indicates that there is more H₂ than O₂ and therefore H₂ is the limiting reactant in the reaction.
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What volume of 17.5 Molar stock solution of acetic acid is required if we prepare 500 milliliters of a 1 Molar acetic acid solution? Show the calculation.
Answer: C1V1=C2V2
Explanation: i hope this help im want to help you please
leave 5
What mass, in grams, of Co(NO) (formular mass 244.96 amu) is present in 1.15 L of a 0.452 M solution?
127 g
21.2 g
2.54 g
623
The mass, in grams, of Co(NO) (formula mass 244.96 amu) present in 1.15 L of a 0.452 M solution is 127.76 g. This is using molarity.
What is molarity?The term "molar concentration" refers to the amount of a substance in a solution represented as a percentage of its volume. It is also used to refer to molarity, quantity concentration, or substance concentration. The most common unit used in chemistry to express molarity is the number of moles per liter, represented by the unit sign mol/L or mol/dm3 in SI units. One molar, or 1 M, of a solution's concentration is defined as one mol/L.
Using molar concentration in thermodynamics is typically impractical since the volume of most solutions changes very little with temperature as a result of thermal expansion.
The mass of Co(NO) present in 1.15 L of a 0.452 M solution would be:
Mass =Volume x Concentration x Formula mass
=1.15L x 0.452 M x 244.96 g/mol
= 127.76 g
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127g is mass of Co(NO) present in 1.15 L of a 0.452 M solution
What does the word "molarity" mean?
Molarity is the ratio of the moles of a solvent to the total volume of the solution. The solution contains both the solute and the solvent. The ratio of the solute moles to the solvent kilograms is known as molality, on the other hand.
The number of moles of dissolved solute per liter of solution is the definition of molarity, a unit of concentration. Molarity is defined as the number of millimoles per milliliter of solution by dividing the number of moles and the volume by 1000.
The mass of Co(NO) present :
Mass =Volume x Concentration x Formula mass
=1.15 x 0.452 x 244.96
= 127.76 g
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A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the recorded sound moves through the speaker.
a. The frequency or amplitude of the waves will not change.
b. The speaker changes the wave from an electromagnetic wave to a mechanical wave.
c. The waves from the speaker are mechanical waves.
d. The frequency or amplitude of the waves could change.
e. The speaker changes the wave from mechanical wave to an electromagnetic wave.
f. The waves from the speaker are electromagnetic waves.
g. The speaker does not change the wave type.
Answer:
c. The waves from the speaker are mechanical waves.
d. The frequency or amplitude of the waves could change.
g. The speaker does not change the wave type.
These statements are true. The waves that come out of the speaker are mechanical waves, meaning they require a medium to travel through, such as air or water. The frequency and amplitude of the waves could change, depending on the characteristics of the sound being played through the speaker. The speaker does not change the type of wave from mechanical to electromagnetic, or vice versa.
What type of nuclear decay is shown by the reaction below?
239U → He + 234 Th
90
O A. Alpha
O B. Gamma
O C. Fusion
O D. Beta
Radioactive decay of alpha. When a nucleus undergoes alpha decay, it changes into a separate nucleus and emits an alpha particle in the process.
How does plutonium 239 form from uranium 238?These two beta decays are sufficient to transform a uranium atom into a plutonium atom since each beta decay converts a neutron into a proton. Consequently, a single atom of uranium-238 that absorbs a single neutron and is left alone over a period of time sufficient for it to experience two beta decays (a few weeks or so) will transform into a single atom of pu-239.
Does the fission of plutonium-239 decay?Over 100 radioisotopes with half-lives ranging from fractions of a second to millions of years are created when plutonium-239 or uranium-235 are fissioned. By neutron absorption in the fuel or surrounding materials, more radioisotopes are created.
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Find ΔE for the change in state of 1.0 mol H2O (l) at 79∘C to H2O(g) at 114 ∘C. The heat capacity of H2O(l) = 75.3 J/molK, the heat capacity of H2O(g) = 25.0 J/molK, and the heat of vaporization of H2O is 40.7×103J/mol at 100 ∘C.
The energy change for the change in state of 1.0 mol H2O (l) at 79∘C to H2O(g) at 114∘C is 42,643 J/mol.
What are heat capacity and specific heat?The heat capacity of a thing is the amount of energy needed to raise its temperature by one degree Celsius. The amount of energy needed to increase the temperature of 1 gram of a substance by 1oC is known as a substance's specific heat.
We have to calculate the power needed to warm one mole of liquid water from 79∘C to 100∘C:
q1 = nCΔT
= (1.0 mol)(75.3 J/molK)(100-79 K)
= 1593 J
we have to calculate the energy,
q2 = nΔHvap
= (1.0 mol)(40.7×10^3 J/mol)
= 40,700 J
Now, we have to calculate the energy,
q3 = nCΔT
q3 = (1.0 mol)(25.0 J/molK)(114-100 K)
q3 = 350 J
The total energy change is:
ΔE = q1 + q2 + q3
ΔE = 1593 J + 40,700 J + 350 J
ΔE = 42,643 J/mol
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Balance the following chemical reaction:
Al (SOA): (ag) + K,POA (ag) -> AlPOA (S) + KaS0A (ag)
What is the sum of all cofficients? (do not forget the coefficient "]" in a balanced equation).
Al₂(SO₄)₃ (ag) +2 K₃PO₄ (ag) → 2 AlPO₄ (s) + 3 K₂SO₄ (ag). This the balanced chemical equation. The sum of the coefficients of reaction is 7.
How to balance chemical equation?1) Name each component of the equation. Once the equation is balanced, the number of atoms of each kind must be equal on both sides.
2) What is each side of the equation's net charge? Once the equation is balanced, the net charge must be the same on both sides.
3) Start, if you can, with an element that is present in a single compound on each side of the equation. In order for the number of atoms of the element to be the same on both sides of the equation, adjust the coefficients (the numbers in front of the compound or molecule). To balance an equation, keep in mind that you must adjust the coefficients in the formulas, not the subscripts.
4) Once one element is balanced, proceed to balancing the other element. Continue until all components are in balance. It's simplest to finish with the elements present in their purest state.
5) Make sure the charge is balanced on both sides of the equation by checking your work.
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