If a tank of gas contains 4 L of N O2 how many molecules are in it

Answers

Answer 1

but heres a way to solve it

An athlete takes a deep breath, inhaling 1.85 L of air at 21°C and 754 mm Hg.

T

How many moles of air are in the breath? How many molecules?

Gas constant, R= 8.314 J mol ¹ K-1

PV = nRT

PV

RT

h=

=

P

= 0.08206 L atm mol-1 K-1

= 62.36 L Torr mol-1 K-1 -

1 atm = 760 mm Hg = 760 Torr

754 Forr 1.85€

6236 Jerr 294K


Related Questions

Calculate the mass of water producd from the reaction of 126g of pentaboron noahydride with 192g of moleculAR OXYGEN

Answers

Answer:

81.08g of H[tex]_{2}[/tex]O will be produced.

Explanation:

Write down the balanced chemical equation:

[tex]B_5H_9 + O_2[/tex] ⇒ [tex]B_2O_3+H_2O[/tex]

[tex]2B_5H_9+12O_2[/tex] ⇒ [tex]5B_2O_3+9H_2O[/tex]

Determine the limiting reagent:

[tex]B_5H_9[/tex] :-    126/63.12646 = 1.995993 mol

               1.995993/2 = 0.9979965

[tex]O_2[/tex] :-         192/31.9988 = 6.000225 mol

               6.000225/12 = 0.50001875

Therefore, [tex]O_2[/tex], is the limiting reagent.

Use stoichiometry ratios to determine the number of moles of water produced:

         [tex]O_2[/tex]         :        [tex]H_2O[/tex]

         12          :          9

  6.000225   :       4,500168756328362

Use the mole formula to calculate the mass of water produced:

[tex]n=\frac{m}{M} \\m=nM\\m=(4.500168756328362)(18.01528)\\m=81.08g[/tex]

Under what circumstances can the general trend to disorder in the universe be reversed?

Answers

Answer:

See explanation.

Explanation:

This will never naturally occur but you can tweak the system quantum mechanically to temporarily reverse entropy.

How many valence electrons do atoms need to be stable? What is the exception?

Answers

In order for an atom to be stable it should have eight valence electrons in order to follow the octet rule the only exception to this rule is hydrogen as the maximum valence electrons it is able to hold is two

What property of a substance does its specific heat capacity describe?
OA. How much heat is needed to melt it
OB. How much kinetic energy it contains
O C. How much heat it takes to raise the temperature
D. How good an insulator it is

Answers

Answer: How much heat it takes to raise the temperature

Specific heat describes how much heat a substance takes to raise the temperature. Hence, Option (c) is correct

What is Specific Heat ?

Specific heat capacity is the amount of heat energy required to raise the temperature of a substance per unit of mass.

The specific heat capacity of a material is a physical property.

It is also an example of an extensive property since its value is proportional to the size of the system being examined.

Specific heat describes how much heat a substance takes to raise the temperature. Hence, Option (c) is correct

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A solution of sulfuric acid (h2so4) has a concentration of 6.0m. it contains 14.7mol h2so4. what is its volume? reference: m = mol/l
group of answer choices

0.41l

88.2l

none of these are correct.

2.45l

Answers

Answer:

V = 0.41L

Explanation:

[tex]c=\frac{n}{V}\\n=cV\\14.7=6.0V\\ \\V=0.41l[/tex]

ANS THIS SMALL QUESTION

Answers

should be b. an increase in temperature catalyzes a reaction, but it doesnt add anything new


Which of the following is one of the ending compounds
during cellular respiration?
O Glucose
O Mitochondria
O Oxygen
O Water

Answers

The answer is Water and carbon dioxide

How many moles are in 8.35 g of H2O?

Answers

It’s is 130 that is the answer!!!!

What is the structure of the cytosine base after catalysis by dnmt3a?.

Answers

The structure of the cytosine base after catalysis by DNMT is 5'Mecytosine.

What is a cytosine base?

Cytosine (C) is one of the four nucleotide bases in DNA, with the other three being adenine (A), guanine (G) and thymine (T).

Methylation of the cytosine base is catalyzed by the enzyme DNA methyltransferase (DNMT), and S-adenosyl methionine (SAM) functions as the methyl group donor.

Hence, the structure of the cytosine base after catalysis by DNMT is 5'Mecytosine.

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Four cars travel at the same speed down a road. Their mass and kinetic energy are shown in the graph,
80,000
60,000
40,000
al
20,000
0
500
1,000
1,500 2,000
Mass (kg)
Which statement is true about the kinetic energy of the cars?
OA, Kinetic energy is unrelated to the mass of the cars.
B. Kinetic energy is proportional to the mass of the cars.
Oc. Kinetic energy is proportional to the mass of the cars squared.
OD. Kinetic energy is inversely proportional to the mass of the cars.
Kinetic Energy (1)

Answers

Answer:B

Explanation:

Griffin made the following list of the different outer coverings of a plant. which part of his list is incorrect?


outer coverings of plants
fuzzy hairs

spines

bark

stamen
bark
fuzzy hairs
spines
stamen

Answers

Stamen is not an outer covering its the reproductive organ of the plants.

What is use of covering of Plants ?

Outer covering of plants is useful in protecting them from environment factors , it is useful in keeping the moisture intact inside the plants.

Among the different outer covering , Bark ,stamen , spines and fuzzy hairs

Bark , stamen and fuzzy hairs are all the outer covering of plants

Stamen is not an outer covering its the reproductive organ of the plants.

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the combustion of 17.41 grams of a compound known to only contain carbon, hydrogen, and oxygen produced 25.61 grams of carbon dioxide and 10.48 grams of water. a.) how much percentage of the compound is carbon? b.) how much percentage of the compound is hydrogen? c.) how much percentage of the compound is oxygen?

Answers

The compound which on combustion produces Carbon-di-oxide and water is carbohydrates.

Percentage of Carbon = 6.98 / 17.41 x 100 = 40 %Percentage of Hydrogen = 15.08 / 17.41 x 100 = 86.61 %Percentage of Oxygen = 4.6 / 17.41 x 100 = 26.42 %

What is combustion reaction ?

Those reaction in which the Crabon present in the reatctant gets reacted with oxygen and produces Carbon-di-oxide.


It is an Exothermic Reaction.

Combustion of carbohydrate ;

[tex]C_6H_1_2 O_6 + O_2 - > 6CO_2 +2H_2O[/tex]

To find out the percentage of C, H and O, we must know about there weight in the product.

Given,

Total weight of compund [Reactant] = 17.41 grams

Weight of carbon dioxide [Product] = 25.61 grams

Weight of water [Product]= 10.48 grams

Now, we need to find out the weight of C,H and O in the products ;

Mass of Carbon = No. of Moles x Atomic weight


No. of Moles of Crabon =   [tex]\frac{Given \\ weight\\ of\\ the\\ compound}{Molecular\\ weight\\ of\\ the compound}[/tex] x No. of C-atoms in molecule                          

No. of Moles of Crabon =25.61 / 44 = 0.58 x 1 = 0.58 moles

Mass of Carbon = 0.58 moles x 12 = 6.98 gm

Mass of Hydrogen = No. of Moles x Atomic weight

No. of Moles of Hydrogen =   [tex]\frac{Given \\ weight\\ of\\ the\\ compound}{Molecular\\ weight\\ of\\ the compound}[/tex] x No. of H-atoms in molecule                          

No. of Moles of Hydrogen =10.48/ 18 = 0.58 x 2 = 1.16 moles

Mass of Hydrogen = 1.16 moles x 12 = 15.08 gm

Mass of Oxygen = Total weight of compound - (Weight of C & H)

                                       =   17.41 grams - ( 15.08 gm + 6.98 gm)
Mass of Oxygen  = 4.6 gm

Now,

Percentage of atom =  [tex]\frac{Mass \\ of \\ Atom}{Total\\ weight \\ of\\ compound}[/tex]   x 100

Percentage of Carbon = 6.98 / 17.41 x 100 = 40 %Percentage of Hydrogen = 15.08 / 17.41 x 100 = 86.61 %Percentage of Oxygen = 4.6 / 17.41 x 100 = 26.42 %

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How many moles of a gas sample are in a
20.0 L container at 373 K and 203 kPa? The gas constant is 8.31 L - kPa/mol -K.

0.33 mole

0.65 mole

1.30 moles

3.05 moles

Answers

The moles of the gas sample present is 1.30 , Option C is the right answer.

What is Ideal Gas Equation ?

Ideal Gas Equation states that for an ideal gas , the product of pressure and volume is equal to the product of moles , universal gas constant and the temperature.

PV =nRT

Given in the question

Volume = 20 Litre

T = 373 K

P = 203kPa

R =8.31 L - kPa/mol -K.

Therefore

203 * 20 = n *8.31 *373

n = 1.30 moles

Therefore the moles of the gas sample present is 1.30 .

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TRUE OR FALSE

Q1.) Is the distances of the gas molecules are far greater than it's molecule dimensions.?

Q2.) The movement of any gas particle/molecules is directly affected by temperature.?

。゚(TヮT)゚。 H-Help me with this pls...,,

Answers

Answer:

Q1. False

Q2. True

Explanation:

gas molecules are not that at far than dimensions molecules

How many moles of na contain 7.88x1021 atoms of na

Answers

Answer:

the answer to the qustion is 0.013089701 na

Explanation:

n/a

Which, if any, of the substances had resonance structures? how many resonance did each substance have?
ccl4
h2o
co2
h2o2
ch4
c2h4
ch2o
ch3oh
ch3nh2
nf3
nh3
[nh4]
[no2]-
so2
of2
h2s
sf6
icl5

Answers

The following are the compounds in the list that possesses resonance structures; CO2, [NO2]-, SO2 and OF2

What are resonance structures?

Resonance structures tend to arise when a single structure does not account for all the properties of a compound. This is a concept that arose from the valence bond theory.

The following are the compounds in the list that possesses resonance structures; CO2, [NO2]-, SO2 and OF2

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the granite sample has a mass of 24.31 g and a volume of 9.35cm3. what is the density of the granite?

Answers

the density is 2.6 g/mL

Explanation:

you divide 24.31 by 9.35 and end up with 2.6111707841, just round it off to 2.6

The density is 2.6 g/mL of granite.

What is density?

Density is defined as the mass per unit volume it means that mass present in 1 meter cube is called density. The S.I unit of density is kg/m^3 and in C.G.S it is gram/cm^3.

So In above statement we can understand that density, mass, and volume all are convert to each other it means that if we know any two variable then third one will be calculated easily.

Mathematically,

Formula for density will be as mentioned below:-

Density = Mass/Volume.

From above formula we can calculate mass which is as follows:-

Mass = Volume × Density.

S.I unit of mass is kilograms and C.G.S unit is gram.

And similarly we can calculate the volume which is equal to as follows:-

Volume = mass / density.

S.I unit of volume is meter cube and C.G.S unit is cubic centimeter. Density is defined as the mass per unit volume it means that mass present in 1 meter cube is called density.

From above formula we can calculate mass which is as follows:-

Mass = Volume × Density.

S.I unit of mass is kilograms and C.G.S unit is gram.

Therefore, The density is 2.6 g/mL of granite.

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During a reaction, the enthalpy of formation of an intermediate is 34 kJ/mol. During the reaction, 4 moles of the intermediate are produced. What is the enthalpy value for this step of the reaction?​

Answers

The enthalpy change for the formation step of this intermediate is 136 kJ/mol.

What is the enthalpy?

The enthalpy of reaction can be obtained from the enthalpies of formation of the species involved. The enthalpy of reaction is the heat evolved or absorbed in a reaction.

Thus, the enthalpy change for the formation step of this intermediate is 4 *  34 kJ/mol = 136 kJ/mol.

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The following diagram represents what type of reaction?

Answers

The type of reaction represented by the diagram is (C). Fission

Meaning of Nuclear Fission

Nuclear fission can be defined as a reaction in which the nucleus of an atom splits or breaks into two or more smaller portions of nuclei.

Nuclear fission is so important and is often seen or encountered when dealing with elements with high nuclear properties.

In conclusion,  the type of reaction represented by the diagram is Fission

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Hello Brainly! Please Help! Thank You! (The Directions are the Red Text)​

Answers

Answer:

ok so which answer do you want if you want all then here's this

Explanation:

you should remember that you aren't the only on who dosent know the answers because I don't so ask a parent

What are some skills many CTSOs help their members develop? Select two options.

Answers

CTSO is an extracurricular program for students. The program helps the students build leadership qualities and career-specific skills.

What is CTSO?

A career and technical student organization is a program designed and implemented for the students to improve their interpersonal relationships, goal setting, and build leadership skills.

CTSO helps in building the skills required for professional career establishment and for the educational purposes that are other than academics. It includes competitions, plays, sports events, etc.

Therefore, CTSO increases leadership skills and provides career-specific skills.

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Answer

the answer to your question is leadership and career-specific skills  hope this helps ;)

Explanation:

How do potential and kinetic energy work?

Answers

Answer:

You now know that potential energy is position relative, and kinetic energy is motion relative. The primary relationship between the two is their ability to transform into each other. In other words, potential energy transforms into kinetic energy, and kinetic energy converts into potential energy, and then back again.

Explanation:

don't forget to mark me brainlist

A woman is deciding between three alarm systems to install in her home. Each alarm system produces a wave with a different wavelength and decibel level, as shown in the following table.
If the woman wants the alarm with the lowest pitch, which alarm should she choose? Explain your answer.



Based on the data in the table, which alarm produces sound waves with the greatest amplitude? Explain your answer.


Write 3–4 sentences identifying which alarm has the lowest pitch and explain why you chose that alarm?

Write 3–4 sentences identifying the alarm that produces a sound with the greatest amplitude and explain why you chose that alarm?

Answers

Answer:

Based on the data in the table, which alarm produces sound waves with the greatest amplitude? Explain your answer.

this bit says based on the table but there is no table.

An air mattress is filled with 0.55 moles of air. the air inside the mattress has a temperature of 295 k and an absolute pressure of 3.5 kilopascals. what is the volume of the air mattress? the volume of the air mattress is liters.

Answers

The volume of the air mattress filled with 0.55 moles of air and has a temperature of 295 k and an absolute pressure of 3.5 kilopascals is 386L.

How to calculate volume?

The volume of a gas can be calculated by using the ideal gas law equation as follows:

PV = nRT

Where;

P = pressureV = volumen = number of molesR = gas law constantT = temperature

0.0345 × V = 0.55 × 0.0821 × 295

0.0345V = 13.32

V = 386L

Therefore, the volume of the air mattress filled with 0.55 moles of air and has a temperature of 295 k and an absolute pressure of 3.5 kilopascals is 386L.

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Answer:

The answer is 34.2 L.

Explanation:

Ideal Gas Law = PV = nRT
(where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.)

Plug in the known values into the Ideal Gas Law equation:

3.5 kPa * V = 0.55 moles * 8.31 J/mol*K * 295 K

Finally, solve for V:

V = (0.55 moles * 8.31 J/mol*K * 295 K) / 3.5 kPa

= 34.2 L

What mass of Na2CO3 will be required to dissolve in 0.3 L of water to make a 0.5 M solution?

Answers

The mass of [tex]Na_2CO_3[/tex] that will be required to be dissolved in water would be 15.9 grams

Solution preparation

Recall that:  molarity = mole/volume in L

In this case, the volume is 0.3 L and the molarity is 0.5 M.

Thus, mole = molarity x volume = 0.5 x 0.3 = 0.15 moles

Mass of 0.15 moles  [tex]Na_2CO_3[/tex] = 0.15 x 106 = 15.9 grams

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PLEASE HELP ANYONE!!
Claim: A small spark can start a huge explosion.

Evidence:

Reasoning:

Answers

Answer:

I think a small spark can start a huge explosion because, a spark or a small firework for an example, can start a fire. You don’t want to have a spark or sparkler lit in your house. This is why I think that it could start a fire.

Explanation:

reasoning

My reason is that if you have a lighter, and you lite the sparkler or spark, you will definitely see a flame glowing at the top. One reason for why you need to lite things that could start fires outside is, that it can be deadly if you accidentally leave one inside or somewhere close to your house or a window. Another piece of evidence is one from a movie. This scenario is kind of like the one in a dogs purpose. A dog’s purpose is about how a dog begins there life as a puppy, they eventually end up having to be saved again by their owner but that’s the summary for just the small unimportant parts. But the real reason for why I’m comparing the question to this is because, in the movie, the rising action, is kind of when the dog, gets put to sleep. But after it goes on all different types of adventures both dangerous, boring at times, and then mood changing I think the story is similar to the question because, a adult sets a fire on the house and the owner of the dog and the owners mom have to get out with there dog. The owner that’s a boy or adult boy, has to jump out the window after saving his dog and this is how a small spark can make a huge impact or life changing lesson.

When carbon bonds in organic compounds, which of the following is/are true: (1) Carbon makes 4 bonds. (2) Carbon can form single, double or triple bonds. (3) Carbon atoms can form branched chains. (4) Carbon forms covalent bonds. (5) All of the above are true.

Answers

All of the above are true as regards carbon bonds in organic compounds and is denoted as option 5.

What is Organic compound?

These are chemical compounds which contain carbon-hydrogen or carbon-carbon bonds. Carbon has four valence electrons which makes it tetravalent and able to form multiple bonds.

They can form multiple bonds and branched chains in hydrocarbons such as alkanes, alkenes and alkynes during reactions.

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Help number 5 question

Answers

Answer:

In water, bases dissolve and provide hydroxide (OH-) to the surrounding solution. This lowers the acidity of the solution.

Some industries require a decrease in the rates of reactions instead of speeding them
up.

1) Name an industry that requires such criteria.

2) How is this possible? Suggest and explain two different ways

Answers

Food industries require that reaction rates be lowered and this can be done by addition of preservatives and by freezing food substances.

What is rate of reaction?

The rate of a reaction is a measure of amount of substances converted to products per unit.

Substances that speed up rate of reactions are known as catalysts.

Some catalysts though, reduce or slow down the rate of reactions.

An industry that requires the rate of reactions to slow down is the food industry.

Some methods employed to slow down reaction rates include:

Freezing - lowering temperature reduces rate of reactionsUse of preservatives - preservatives are chemical that inhibit certain organisms and catalysts from acting on food

Therefore, food industries require that reaction rates be lowered and this can be done by addition of preservatives and by freezing food substances.

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Type the correct answer in the box. Use numerals instead of words.
A copper coin with a mass of 6.30 grams changes temperature in the sunshine from 20.0°C to 32.0°C. How much energy is transferred? The specific heat capacity of copper is 0.377 joules/gram degree Celsius. Express your answer to three significant figures.

The amount of energy transferred to the coin is ???
joules.

Answers

28.5 J is the amount of energy transferred to the coin.

What is specific heat capacity?

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Energy is calculated mCΔT formula  where,

m(mass)= 6.30  grams

C(specific heat capacity)= 0.377 j/g

ΔT(change in temperature)= 32.0°C- 20°C= 12 °C

Energy is, therefore:

Q = mCΔT

Q= 6.30 g  x 0.377  j/g /°C x   12 °C

Q= 28.5 J

Hence, 28.5 J is the amount of energy transferred to the coin.

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Answer:

28.5 J is which what is the amount of energy transferred or given to the coin.








Explanation:

Have a great rest of your day
The one and only
Mr. Universe

Other Questions
Fish populations in some areas of the ocean have been exhausted by overfishing. This has caused ecosystems to become imbalanced and species to become endangered. The diagram below breaks the ocean's total fish population into three categoriesspecies declining in population (overfished), species growing in population (moderately fished), and species with stable population (fully fished). The graph shows the percentage of the total fish population represented by each category for various years between 1974 to 2000. For example, in 1974, 51% of the population was fully fished, 39% was moderately fished, and 10% was overfished. What can be said about the trend in fish populations between 1974 and 2000? A. The percentage of the total fish population that is fully fished decreased by 18%. B. The percentage of the total fish population that is overfished increased by 18%. C. The percentage of the total fish population that is moderately fished increased by 18%. D. The percentage of the total fish population that is overfished decreased by 18%. Reset Submit Which cross-sectional shapes do you find the most surprising? Explain why. what are the advantage and disadvantage of specialization What is the mass of 15.0 ml of a liquid that has a density of 0.694 g/cm? Katherine is landscaping her home with juniper trees and pansies. She wants to arrange 15 pansies around each of 8 trees. Each tree costs $20.75 and a six-pack of pansies costs $2.50. Explain how to write an expression to find Katherines final cost. If someone is particularly pale, what would you call them?. If you know that the period of a pendulum is 1.87 seconds, what is the length of that pendulum? (assume that we are on earth and that gravity is 9.81 meters/second. ) a. 0.87 centimeters b. 2.1 meters c. 1.6 meters d. 0.87 meters e. 8.3 meters why is planning is important before choosing profession The square root of a negative number, such as StartRoot negative 144 EndRoot, is undefined. Explain why the square root of x, StartRoot negative x EndRoot, is not necessarily undefined and what this means about the domain and range of f(x) = StartRoot negative x EndRoot. In an experiment, the molar mass of the compound was determined to be 118.084 g/mol. What is the molecular formula of the compound? change 35:14 to a decimal number A quadrilateral has rotational symmetry of order 2 and no line of symmetry. What is the name of this quadrilateral? a. square b. rectangle c. parallelogram d. rhombus Pretty lady cosmetic products has an average production process time of 40 days. Finished goods are kept on hand for an average of 15 days before they are sold. Accounts receivable are outstanding an average of 35 days, and the firm receives 40 days of credit on its purchases from suppliers. Assume sales of $1,200,000 and cost of goods sold of $900,000. Determine the average investment in accounts receivable, inventories, and accounts payable. What would be the net financing need considering only these three accounts What is the authors claim in this passage? We call it ________________ when the nucleus divides into two identical _____________________. Hypothesize which people or country lost the most because of u.s. land acquisition. Words with the word root dorm will have a meaning related to Mike pays $285 in rent every week.How much will he pay in rent for the entire year? Chua Chang & Wu Inc. is planning its operations for next year, and the CEO wants you to forecast the firm's additional funds needed (AFN). Data for use in your forecast are shown below. Based on the AFN equation, what is the AFN for the coming year? Which statement explains how this excerpt relates to the position of women during Eleanor Roosevelts time?Although some women may have raised sons and daughters, they lived during a time when they taught their daughters to work in the home.Although some women had difficult upbringings, they lived during a time when working in the home was their only option.Although some women may have had doubts about working in the home, they lived during a time when doing so was often taken for granted. Although some women had been raised to consider individual careers, they lived during a time when they often opted to work in the home.