Question

A vessel contains 16 g of hydrogen and 128 g of oxygen at standard temperature and pressure. The volume of the vessel in cm3 is:

• A. 72 × 105
• B. 32 × 105
• C. 27 × 104
• D. 54 × 104

Answer 1

Answer: (C)

27 × 104

Answer 2

The correct answer is (C) : 27 × 104
Total number of moles are
$n = n_{H_2} + n_{O_2}$
$= \frac{16}{2} + \frac{128}{32}$
= 12 moles
Using PV = nRT
$V =\frac{nRT}{ P}$
$=\frac{12 × 8.31 × 273.15}{10^5}$ $m3$
= 0.27 m3
= 27 × 104 cm3