Mole Concept

$74.5 \mathrm{g}$ of metal chloride contains $35.5 \mathrm{g}$ of chlorine.
The equivalent weight of metal is

How many litre of oxygen at $\mathrm{STP}$ is required to bum $60 \mathrm{g} {\mathrm{C}}_2{\mathrm{H}}_6$?

One litre of ${\mathrm{CO}}_2$ is passed through red hot coke. The volume becomes $1.4 \mathrm{litres}$ at same temperature and pressure. The composition of products is

Volume of ${\mathrm{CO}}_2$ obtained at $\mathrm{STP}$ by the complete decomposition of $9.85 \mathrm{g} {\mathrm{Na}}_2{\mathrm{CO}}_3$ is

The amount of zinc required to produce $1.12 \mathrm{ml}$ of ${\mathrm{H}}_2$ at $\mathrm{STP}$ on treatment with $\mathrm{dilute} \mathrm{HCI}$will be

$1 \mathrm{mol}$ of ${\mathrm{KClO}}_3$ is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many moles of ${\mathrm{Al}}_2{\mathrm{O}}_3$ are formed?

The number of mole of nitrogen in one litre of air $10\%$ nitrogen by volume, under standard conditions, is

The number of electrons in $1.6 \mathrm{g}$ of ${\mathrm{CH}}_4$ is approximately

Number of $\mathrm{Fe}$ atoms in $100 \mathrm{g}$Haemoglobin if it contains $0.33\% \mathrm{Fe}$ . (Atomic mass of $\mathrm{Fe} = 56$)

The total number of electrons in $4.2 \mathrm{g}$ of ${\mathrm{N}}^{3-}$ ion is (${\mathrm{N}}_{\mathrm{A}}$ is the Avogadro's number):

The number of atoms in $0.1$ mol of a tetraatomic gas is $\left({\mathrm{N}}_{\mathrm{A}}=6.02\times {10}^{23} {\mathrm{mol}}^{-1}\right)$

The number of molecules in $4.25 \mathrm{g}$ of ${\mathrm{NH}}_3$ is approximately

Which has maximum molecules?

When $\mathrm{x}$ molecules are removed from $200 \mathrm{mg}$ of ${\mathrm{N}}_2\mathrm{O}, 2.89\times {10}^{-3}$ moles of ${\mathrm{N}}_2\mathrm{O}$ are left. $\mathrm{x}$ will be

The total number of electrons in $1.6 \mathrm{g}$ of ${\mathrm{CH}}_4$ to that in $1.8 \mathrm{g}$ of ${\mathrm{H}}_2\mathrm{O}$

Mass of $1 \mathrm{amu}$ in $\mathrm{g}$

The number of particles present in $1 \mathrm{mol}$ of nitrogen atom are

What weight in grams is represents by $1.5 \mathrm{moles}$ of sulphur dioxide?

The number of mole of $\mathrm{N}$-atom in $18.066\times {10}^{23}$ nitrogen atoms is