Question

Convert into mole:
12g of oxygen gas

Answer 1

Here we are given the mass of oxygen gas as 12 grams

Formula of oxygen gas = O₂

Molar mass  = 2 × 16 = 32 grams.

We know the formula to calculate the no: of moles

No : of moles = Given mass ÷ Molar mass
                      = 12 ÷ 32 
                      = 0.375 moles

Answer 2

Given,

Mass (m) = 12 g

Molar mass (M) = 2 * 16
= 32

To convert 12 g of O2 into mole,

Formula,

No. of moles (n) = Given mass (m) / Molar mass (M)

n = m / M

n = 12 / 32

n = 0.375 moles