Question

12g of oxygen gas (O=16g)​

Answer 1

Explanation:

oxygen gas as 12 grams.

Molar mass = 2×16 = 32 grams.

We know the formula to calculate the number of moles. = 0.375 moles

Answer 2

$\huge \boxed {\fcolorbox{white}{pink}{Answer}}$

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 number of moles.

Number of moles = Given mass ÷ Molar mass

= 12 ÷ 32

= 0.375 moles