Question

calculate 12gram of oxygen gas into moles​

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

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Answer 2

Mass of o gas= 12g

Mole of o gas = given mass/molecular mass

12/12

=1