Question

The volume of gas at 0°C and 700 MM pressure is 760 mL the number of molecules present in this volume is

Answer 1

Answer:

From ideal gas equation

PV = nRT

n = PV / (RT)

= 700/760 atm × 760 × 10⁻³ L / (0.0821 L atm / (mol K) × 273 K)

= 0.03 mol

= 0.03 × 6.022 × 10²³ molecules

= 1.80 × 10²² molecules

∴ 1.80 × 10²² molecules are present in the given volume.

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