Question

Mass of 112 Ml of a certain
s 0.229
gas
STP. How many
molecules are there the sample
gas ? What is the molar mass of the gas?​

Answer 1

Answer:

➜ number of molecules = 30.11 × 10²¹ molecules

➜ molar mass of the gas = 44 g

Explanation:

We know,

On substituting the values, we get

Now,

1 mol = 6.022 × 10²⁴ atoms / molecules

0.005 mol = 6.022 × 0.005 × 10²⁴

➜ 6.022 × 5 × 10²¹

➜ 30.11 × 10²¹ molecules

Also,

No. of moles = Mass given / Molar mass

☛ 0.005 = 0.22 / molar mass

☛ molar mass = 0.22 / 0.005

☛ molar mass = 44 g