Question

calculate the number of moles in 8g of oxygen

Answer 1

n=given wt/ molecular wt, where n is no of moles
n = 8 / 16
n= 0.5

Answer 2

Given:

Mass of oxygen = 8g

To find:

Number of moles = ?

Formula to be used:

$Number of moles = \frac{Given mass}{Molar mass}$

Calculation:

The molar mass of oxygen is 16.

∴ $Number of moles = \frac{Given mass}{Molar mass}$

$Number of moles = \frac{8g}{16g}$

$Number of moles = 0.5$

Conclusion:

8 g of oxygen is composed of 0.5 moles.

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