How many moles of nitrogen atoms are present in $8 \ g$ of ammonium nitrate (in $mol$)?

The number of moles of a gas in $1 \, m^3$ of volume at $NTP$ is

The number of hydrogen atoms present in $5.4 \ g$ of urea is : (Given : Molar mass of urea: $60 \ g \ mol^{-1}$, $N_{A} = 6.022 \times 10^{23} \ particles \ mol^{-1}$)

What is the number of atoms present in $16 \ g$ of oxygen gas $(O_2)$?

The number of molecules and moles in $2.8375 \ L$ of $O_2$ at $STP$ are respectively

Numbers of gram atoms of oxygen present in $0.8 \ mol$ of $C_4H_6O_6$ would be