Question

What weight of oxygen gas will contain the same number of molecules as 56 g of nitrogen gas ? (O = 16 u ; N = 14 u)

Answer 1

Explanation:

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Answer 2

Explanation:

Given,

Mass of nitrogen gas = 56 gm

Molar mass of nitrogen = 14 gm

Number of moles of nitrogen = given mass of the element = $\frac{56}{14}$ = 4 moles

Equal number of moles of all the susbtances contain equal number of molecules.

So,

4 moles of nitrogen and 4 moles of oxygen contains same number of molecules.

Hence,

Mass of 4 mole of oxygen = $4\times16$ gm = 64 gm