How many molecules of oxygen is used when 15 grams of CH4 is burned in open air?

A mixture of H2 and water vapor is present in a closed vessel at 20. 00°C. The total pressure of the system is 755. 0 mmHg. The

MAVERICK [17]

The partial stress of H2 is 737.47 mmHg Let's observe the Ideal Gas Law to find out the whole mols.

We count on that the closed vessel has 1L of volume

P.V=n.R.T
We must convert mmHg to atm. 760 mmHg.
1 atm
755 mmHg (755/760) = 0.993 atm
0.993 m.1L=n.0.082 L.atm/mol.K .
293 K(0.993 atm 1.1L)/(0.082mol.K /L.atm).
293K = n
0.0413mols = n

These are the whole moles. Now we are able to know the moles of water vapor, to discover the molar fraction of it.

P.V=n.R.T
760 mmHg. 1 atm
17.5 mmHg (17.5 mmHg / 760 mmHg)=0.0230 atm
0.0230 m.1L=n.0.082 L.atm/mol.K.293 K(0.0230atm.1L)/(0.082mol.K/L.atm .293K)=n 9.58 × 10 ^ 4 mols = n.
Molar fraction = mols )f gas/general mols.
Molar fraction water vapor =9.58×10^ -four mols / 0.0413 mols
Sum of molar fraction =1
1 - 9.58 × 10 ^ 4 × mols / 0.0413 ×mols = molar fraction H2
0.9767 = molar fraction H2
H2 pressure / Total pressure =molar fraction H2
H2 pressure / 55mmHg = =0.9767 0.9767 = h2 pressure =755 mmHg.
737,47 mmHg.

<h3>What is a mole fraction?</h3>

Mole fraction is a unit of concentration, described to be identical to the variety of moles of an issue divided through the whole variety of moles of a solution. Because it's miles a ratio, mole fraction is a unitless expression.

Thus it is clear that the partial pressure of H2 is 737,47 mmHg.

To learn more about partial pressure refer to the link :

brainly.com/question/19813237

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5 0

3 years ago

what would be the observation when you dipp magnesium hydroxide in a blue litmus paper and a red litmus paper. also what would b

Ludmilka [50]

Answer:

red litmus will turn blue

blue litmus will remain blue

Explanation:

magnesium hydroxide is a base therefore turns red litmus paper blue

4 0

3 years ago

Read 2 more answers

Which step in his experiment is the most important if he wants his experiment to correctly demonstrate the conservation of mass?

Oksi-84 [34.3K]

D I’m pretty sure if I’m wrong I’m sorry!!!

7 0

3 years ago

A scientist is creating a new synthetic material. The material’s density is 6.1 g/cm3. Which sentences describe how the scientis

omeli [17]

Answer:

The density is the relation mass/volume.

Then you can modifiy the density of a material by either affecting the mass or the volume.

If you increase the volumen while keeping the mass constant, the density will decrease (because you are increasing the denominator of the fraction).

Also, you can decrease the mass while keeping the volume constant to decrease the density (because you are decreasing the numerator of the fraction).

Then the answer is decrease the mass or increase the volume, while the other is kept constant.

Explanation:

The density is the relation mass/volume.

Then you can modifiy the density of a material by either affecting the mass or the volume.

If you increase the volumen while keeping the mass constant, the density will decrease (because you are increasing the denominator of the fraction).

Also, you can decrease the mass while keeping the volume constant to decrease the density (because you are decreasing the numerator of the fraction).

Then the answer is decrease the mass or increase the volume, while the other is kept constant.

Read more on Brainly.com - brainly.com/question/1832775#readmore

8 0

3 years ago

Read 2 more answers

Light is classified as _______ because electrical and magnetic fields vibrate in a light wave. Fill in the blank

maks197457 [2]

Base on my prior knowledge about science, Light is classified as Electromagnetic Radiation. When we say Electromagnetic radiation, there is an oscillating electric and magnetic field. Therefore, light doesn't carry any charge so it can't repel or attract charge electrons.

4 0

3 years ago