Question

1. Which of the following gas samples would have the largest
volume, if all samples are at the same temperature and
pressure?

A. 0.309 moles CH_{4}

B. 9×10^{23} molecules of N_{2}

C. 65.7 grams of Xe

D. they would all have the same volume

2. Which of the following gas samples would have the largest
volume, if all samples are at the same temperature and
pressure?

A. 174.5 grams of Xe

B. 8×10^{23} molecules of N_{2}

C. 1.33 moles CO_{2}

D. they would all have the same volume

Answer #1

1. Higher number of moles will have high volume

Moles of N2 = number of particle/ avagadro number

= (9*10^23)/(6.022*10^23)

= 1.495

Moles of Xe = mass / molar mass

65.7 / 131.3

= 0.5

CH4 = 0.309

So, option B is correct.

2. Moles of Xe = 174.5 / 131.3

= 1.33

Moles of N2 = ( 8*10^23 ) / ( 6.022*10^23)

= 1.33

Moles of CO2 = 1.33

All have same moles so same volume .

Option D

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