At 25◦C a 4 L sample of H2 exerts a pressure of 5 atm. What pressure would the same sample exert in a 2 L container at 25◦C?

Answers

Answer 1

Answer:

10 atm.

Explanation:

Using the combined gas law equation as follows;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question,

P1 = 5 atm

P2 = ?

V1 = 4L

V2 = 2L

T1 = 25°C = 25 + 273 = 298K

T2 = 25°C = 298K

Using P1V1/T1 = P2V2/T2

5 × 4/298 = P2 × 2/298

20/298 = 2P2/298

Cross multiply

298 × 20 = 298 × 2P2

5960 = 596P2

P2 = 5960 ÷ 596

P2 = 10 atm.


Related Questions

Calculate the number of atoms
in 10.0g of He.
A. 3.83 x 1023
B. 2.41 X 1024
C. 1.51 X 1024
D. 6.02 x 1023

Answers

D.....................

The number of protons is equal to
a the number of neutrons.
b the atomic mass.
c the number of electrons.
d the atomic number.

Answers

Answer:

c the number of electrons

Can someone plz help me with this one problem plzzzzz I’m being timed!!!

Answers

Answer:

answer : the penguins do

What Effect on the temperature of a boiling liquid and on it's distillation temperature is produced by a soluble nonvolatible impurity

Answers

Answer:

What effect on the temperature of a boiling liquid and on its distillation temperature is produced by each of the following?(a)A soluble, nonvolatile impurity? It would cause the mixture to boil at higher temperature and increase the distillation temperature.

It would cause the mixture to boil at a higher temperature and increase the distillation temperature.

What is distillation?

Distillation is a process involving the conversion of a liquid into a vapour that is subsequently condensed back to liquid form.

During distillation, substances separate based on their boiling points. The boiling point of the mixture varies as vapour rises in a distillation column, due to changes in temperature and pressure. This process divides distillation into stages.

Hence, It would cause the mixture to boil at a higher temperature and increase the distillation temperature.

Learn more about distillation here:

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CH4 + 2O + CO2 + 2 H2O
If 9.65 mole of methane reacts with oxygen to produce carbon dioxide and water, what mass of water is produced?

Answers

Answer:

347.4 (19.3 mole)

Explanation:

CH4 + 2O2 = CO2 + 2H2O

1(mole) - 9.65(mole)

2(mole) - x ⇒x = 9.65*2=19.3

m=n*M ⇒ m= 19.3*(1*2+16)= 19.3*18=347.4(g)

Can someone help, please...?

I really can't understand this...

Answers

It’s okay to be a little intimidated by this but the answer is a lot more simple than it may look. All you have to do is multiply the standard enthalpies of formation with their stoichiometric coefficient for every chemical and subtract the reactants from the products:

6(-393.5) + 3(-285.8) -1(49) -15(0)

What does it mean to be limiting or excess? (Limiting Reactant)

Answers

Answer:

Find the limiting reagent by calculating and comparing the amount of product each reactant will produce. Balance the chemical equation for the chemical reaction. The reactant that produces a lesser amount of product is the limiting reagent. The reactant that produces a larger amount of product is the excess reagent.

Explanation:

pls i have a chemistry test answers asap :'( ​

Answers

Answer:

Zinc is more active than copper.

Explanation:

Now, the reason is that Zinc loses its valence electrons more easily than copper to take part in a reaction.

2.)Which action forms a different chemical substance?
A. crushing a rock
B. burning a piece of wood
C.mixing salt and pepper
D.melting an ice cube

Answers

Answer:

B. burning a piece of wood

Explanation:

The Chemical Would Be The Air Coming From The Wood While Burning It

Tell Me If Im Correct  

Please help me with this

Answers

The third one is the correct answer :)

Write the name of flame used In charcoal cavity test.why?

Answers

Answer:

the reducing flame also called the carburizing flame.

Explanation:

because it gets the oxides of the unknown salts

Using the chemical formulae alone, how can you differentiate between Type I Ionic, Type II Ionic, Type III Ionic, and Covalent compounds?

Answers

Explanation:

Type I

These are compounds in which the cation (metal ion) has a fixed charge.

Examples are;

MgO. NaCl

Type II

These are ionic compounds in which the cation (metal ion) has a variable charge.

Examples are;

FeCl3, PbS2

Type III

These are covalent molecules with no cation.

Examples are;

SO3, N2O5

4) What mass of hydrogen is formed when 2.00g of magnesium
Mg + H2SO4–>H2SO4

Answers

Answer: 0.16 g H2

Explanation:

Mg+ H2SO4= MgSO4 + H2

Atomic massof Mg is 24

Molecular mass of H2 is 2

So,

24g Mg produce 2 g H2

1g Mg produce (2÷24)= 0.083 g H2

2.00g Mg produce (0.083×2) g H2

   = 0.16 g H2

 0.16g of hydrogen is formed when 2.00g of magnesium.

The mass of hydrogen gas formed when 2.00g of magnesium is equal to 0.165 g.

What is the balanced chemical equation?

The chemical equation of a reaction is said to be a balanced equation when the number of atoms of substances is equal on either side of the equation.

Evergy balanced chemical equation must follow the law of conservation of mass according to which the total mass of the substances present on the reactant side should be equal to the total mass of substances present on the product side.

Given, the balanced chemical equation of the reaction of Mg and sulfuric acid:

[tex]Mg + H_2SO_4 \longrightarrow MgSO_4 +H_2[/tex]

One mole of magnesium produces hydrogen gas = 1mol

Given the mass of magnesium = 2g

The number of moles of Mg = 2/24.3 = 0.082 mol

Then the number of moles of hydrogen gas formed = 0.082 mol

The mass of the hydrogen gas = 0.082 × 2 = 0.165 g

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I need help :/
:) :) :)

Answers

Answer: I want to say 1

Explanation:

I think

What are some of the ethical issues of editing human DNA? Cite examples from the text to defend your answer.

Answers

Answer:

one would be if the human had no say in it

The most controversial ethical issue surrounding modifying human DNA is, according to the text, is that it will lead to the creation of designer children with improvements in intelligence or physical performance.

What is DNA?

Humans and nearly all other species carry their genetic information in DNA, also known as deoxyribonucleic acid.

The DNA of an individual can be found in almost all of their cells.

The majority of DNA is found in the cell nucleus (where it is known as nuclear DNA), but there is also a small quantity of DNA in the mitochondria (where it is called mitochondrial DNA or mtDNA).

Other ethical issues include the possibility of an identity crisis for a person born with genes from three different people as well as the danger of making mistakes in the human genome that could lead to the spread of genetic illnesses in the population.

Thus, it can be concluded that there are various ethical issues of editing human DNA.

To know more about, DNA refer to the below link:

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Your question is incomplete, but most probably the complete question was,

Read Proposed Treatment to Fix Genetic Diseases Raises Ethical Issues, By Rob Stein, NPR's Morning Edition, 2013

What are some of the ethical issues of editing human DNA? Cite examples from the text to defend your answer.

if common names does not exist how would be the world of organic compounds​

Answers

Explanation:

I think the question is not complete

Um, explain that more

CaC2 + 2H2O ⟶ C2H2 + Ca(OH)2

How many moles of water are needed to produce 56.8g C2H2?

Answers

Amount of moles of water is 4.36 mol

Explanation: M(C2H2) = 2·12.01 + 2·1.008 = 26.036 g/mol

Amount of substance is n= m/M= 56.8 g / 26.036 g/mol= 2.18159 mol

Water is needed 2·2.18 mol = 4.36 mol

Pl help it’s for a grade and I can’t find it

Answers

Answer:

personally I think it's a but it could also be D.

But yeah personally I would say A

which of the following is not found in cytoplasm
A.water
B.carbohydrates
C.salt
D.vitamins ​

Answers

Answer:

B is the right answer

carbohydrates are not found inside the cytoplasm so therefore it is B

Answer:

D

Explanation:

The cytoplasm is composed of water, salt and some organic molecules. (e.g. carbohydrates)

Which of these boxes will not accelerate?

Answers

Answer:

B as all the forces cancel out

Explanation:

20-20=0

25-25=0

What type of reaction does this investigation demonstrate, and as time progresses what will happen to the mass reading on
the scale?
O A. This is a synthesis reaction and the mass reading will decrease as time progresses.
OB. This is a decomposition reaction and the mass reading will stay the same as time progresses,
C. This is a synthesis reaction and the mass reading will stay the same as time progresses,
D. This is a decomposition reaction and the mass reading will decrease as time progresses,

Answers

Answer:

B. This is a decomposition reaction and the mass reading will stay the same as time progresses,

Explanation:

Decomposition reactions are when one reactant decomposes (breaks down) into two or more products. They follow the general form of:

AB --> A + B

The law of conservation of mass tells us that when a chemical reaction takes place, no mass is created or destroyed but transforms from one form to another. You can see from the diagram that you have the same number and type of atoms on each side of the reaction.

Answer:

B

Explanation:

Give one example of
a) Homogeneous mixture of two elements

Answers

Answer:

honey

Coffee

blood

Explanation:

These components are uniformly distrubuted and these cannot be seperated unlike heterogeneous

Water (Hydrogen and oxygen)
Ammonia (nitrogen and hydrogen)
Methane(carbon and hydrogen)
Table salt ( sodium and chlorine)

help, please. balance these equations by writing the proper coefficients in the blanks provided.
1. _____Mg + _____O2 --> _____ MgO
2. _____P + _____O2 --> _____ P2O5
3. _____S + _____O2 ---> _____SO2
4. _____Na + _____Cl --> _____NaCl
5. _____CaCO3 --> _____CaO + _____CO2

thank you :)

Answers

Answer:

1. 2,1,2

2. 4, 5, 2

3. 1,1,1

4. 1, 1, 1

5. 1, 1, 1

Hope this helps!

1. Mercury is most often obtained by roasting cinnabar (HgS). How many grams of cinnabar
are required to obtain 165 grams of mercury?
HgS + 02—-Hg + SO2

Answers

Answer:

191.4 grams of cinnabar  are required to obtain 165 grams of mercury.

Explanation:

The balanced reaction is:

HgS + O₂ ⇒ Hg + SO₂

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

HgS: 1 mole O₂: 1 mole Hg: 1 mole SO₂: 1 mole

Being the molar mass of each compound:

HgS: 232g/moleO₂: 32 g/moleHg: 200 g/moleSO₂: 64 g/mole

the following mass amounts of each compound participate in the reaction:

HgS: 1 mole* 232 g/mole= 232 gO₂: 1 mole* 32 g/mole= 32 gHg: 1 mole* 200 g/mole= 200 gSO₂: 1 mole* 64 g/mole= 64 g

Then you can apply the following rule of three: if by stoichiometry 200 grams of Hg are formed from 232 grams of HgS , 165 grams of Hg are formed from how many grams of HgS?

[tex]mass of HgS=\frac{165 grams of Hg*232 grams of HgS}{200 grams of Hg }[/tex]

mass of HgS= 191.4 grams

191.4 grams of cinnabar  are required to obtain 165 grams of mercury.

Kidneys remove what kind of waste from the body? A. Undigested food B. Carbon dioxide C. Oxygen D. Nitrogen waste

Answers

Answer:

Option D: nitrogen waste

Explanation:

Excretion.

This is removal from of waste products of chemical reactions. It involves the eliminating excess water and salts taken in with our human diet and also spent hormones

Nitrogenous waste products are the human waste products which contain nitrogen and are poisonous to the body.

The kidneys is responsible for the remove of Nitrogenous waste, water, salts, toxins, hormones e. t. c. It is the are the main principle excretory organs. They maintain the constant concentration of materials in the body.

Which is the molar mass of BF3?
10.81 g/mol
29.81 g/mol
48.81 g/mol
67.81 g/mol


Answers

Answer: The molar mass of [tex]BF_3[/tex] is 67.81 g/mol

Explanation:

Molar mass is defined as the mass in grams of 1 mole of a substance.

S.I Unit of Molar mass is gram per mole and it is represented as g/mol.

Atomic Mass of Boron (B) = 10.81 g

Atomic Mass of Flourine (F) = 18.99  g

Molecular mass of  [tex]BF_3[/tex] = 1 (10.81)+3(18.99) g = 67.81 g

Thus molar mass of [tex]BF_3[/tex] is 67.81 g/mol

4.How element gold is different from oxygen?

Answers

Answer:

Gold is a metal, more specifically a transition metal, whereas Oxygen is a nonmetal, more specifically a reactive nonmetal. Using this information, you can compare and contrast metals, nonmetals, and metalloids.

Metals are:

Shiny

High melting point

Mostly silver or gray in color

Mostly solids at room temperature – Mercury (Hg) is a liquid at room temperature

Malleable – able to be hammered into a thin sheet

Ductile – able to be drawn/pulled into a wire

Good conductors of heat and electricity

Nonmetals are:

Dull

Low melting point

Brittle – break easily

Not malleable

Not ductile

Poor conductors of heat and electricity

Metalloids are:

Found on the “zig-zag” line on the Periodic Table of Elements

Have properties of both metals and nonmetals

Can be shiny or dull

Semiconductors – able to conduct electricity under certain conditions

Explanation:

Reccomend this site for questions llike these: https://ptable.com/#Properties

Plz answer question! Due Today!!! Question is in picture! Will make BRAINLIEST for first correct answer!!! No links plz!

Answers

Answer:

I'd Go. B. weigh everything, let the reaction happen, then weigh everything again.

I believe your answer is B

What is the charge of an atom containing 9 protons, 11 neutrons, and 12 electrons?

Answers

Answer:

Explanation: atom is changed to ion. There are 3 more electrons than

Protons, so charge is -3. Actually, F atom can gain only one electron.

Then it will have an octet (8 electrons)

When cobalt(II) chloride is allowed to react with sodium hydroxide, the resulting
products are cobalt(II) hydroxide and sodium chloride. Determine the mass of
cobalt(II) chloride required to completely react with 114g of sodium hydroxide.

Answers

Answer:

Reaction CoCl2 + 2 NaOH -> Co(OH)2 + 2 NaOH

You need to count number of moles of NaOH

Amount of mole is n = m/M = 114 g / 39.998 g/mol = 28,5 mol (about)

Amount of CoCl2 is half from that

Calculate molar mass of CoCl2 and multiply it by 28,5 mol

Explanation:

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