Question

If the $27 ^ { \circ } \mathrm { C }$ then calculate the molar mass of gas in kilogram.

• A. 1
• B. 2
• C. 4
• D. 0.001

Answer 1

Answer: (D)

0.001

Answer 2

$v _ { r m s } = \sqrt { \frac { 3 R T } { M } }$

$30 \times 30 R = \frac { 3 R \times 300 } { M }$

⇒ $M = \frac { 3 \times 300 } { 30 \times 30 } 1 \mathrm { gm } = 0.001 \mathrm {~kg}$.