Question

2.5 moles O2
Determine the mass (grams)

Answer 1

80g

Step-by-step explanation:

Given parameters:

Number of moles of O₂ = 2.5moles

Unknown:

Mass of O₂ = ?

Solution:

To solve this problem, we use the expression below

Mass = number of moles x molar mass

Molar mass of O₂ = 2(16) = 32g/mol

So;

Mass = 2.5 x 32 = 80g