Question

Find n (number of moles) in 16g of methane

Answer 1

look 1 mole of any compound =molecular weight
so
molecular WT. of CH4
$12 + 4 \times 1 = 16g$
so
16g methane=1 mol


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Answer 2

Explanation:

Number of moles equal mass of compound divided by molar mass of compound.

Mathematically,      No. of moles = $\frac{mass given}{molar mass}$

Thus, it is given that mass is 16 g and molar mass of $CH_{4}$ is 16.04 g/mol.

Therefore,     No. of moles = $\frac{mass given}{molar mass}$

                                            = $\frac{16 g}{16.04 g/mol}$

                                            = 0.997 mol

                                            = 1 mol (approx)

Hence, we can conclude that n (number of moles) in 16 g of methane is 1 mol.