Question

What is the mass of 2.50 mol of oxygen gas(O2)? ​

Answer 1

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Answer 2

Given:

Moles present in oxygen gas = 2.50

To find:

Mass of 2.50 mole of oxygen gas ($O_{2}$) = ?

Formula to be used:

m = M × n

Where,

m - Mass

M - Molecular mass

n - Number of moles

Solution:

Step 1 of 2

Find the molecular mass of oxygen

The molecular mass of O = 16

The molecular mass of  $O_{2}$ = 2 × 16

The molecular mass of  $O_{2}$ = 32 g

Step 2 of 2

Substitute the given and obtained values in the formula

m = M × n

m = 32 × 2.50

m = 80

Final answer:

The mass of 2.50 mole of oxygen gas ($O_{2}$) is 80 g.