Identify the number of moles of $H$ atoms present in $n$ moles of the organic compound represented as: (in $n$)

Assertion $(A)$: Equal moles of different substances contain the same number of constituent particles.
Reason $(R)$: Equal weights of different substances contain the same number of constituent particles.
The correct answer is

How many moles of $Al_2(SO_4)_3$ are present in $50 \ g$ of the substance?

The mass of $0.1 \ mol$ of methane $(CH_4)$ is ...... $g$.

The number of oxygen atoms in $4.4 \ g$ of $CO_2$ is,

Calculate the number of moles present in $9.10 \times 10^{-2} \ kg$ of water.