Calculate no. of moles of oxygen molecules in $320$ g of oxygen gas.

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Solution

The atomic mass of oxygen molecule = 32 g
Given mass = 320 g
The moles of oxygen molecules = Given mass / Molar mass
= 320 g / 32 g
= 10

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The number of moles of molecules present in 288 g of oxygen gas is:

2 moles of oxygen gas contain how many numbers of oxygen molecules?

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