Mole Concept

Calculate the number of moles present in $9 \mathrm{g}$ of ethane.

Which contains the greatest number of moles of oxygen atoms?

How many moles of ethane is required to produce $44 \mathrm{g}$ of ${\mathrm{CO}}_2 \left(\mathrm{g}\right)$ after combustion.

The reaction between aluminium and ferric oxide can generate temperatures up to $3273 \mathrm{K}$ and is used in welding metals. (Atomic mass of $\mathrm{Al}=27 \mathrm{u}$   Atomic mass of $\mathrm{O}=16 \mathrm{u}$)

$2\mathrm{Al} + {\mathrm{Fe}}_2{\mathrm{O}}_3\to {\mathrm{Al}}_2{\mathrm{O}}_3+ 2\mathrm{Fe}$;

If, in this process, $324 \mathrm{g}$ of aluminium is allowed to react with $1.12 \mathrm{Kg}$ of ferric oxide. Calculate the mass of ${\mathrm{Al}}_2{\mathrm{O}}_3$ formed.

Mass of one atom of an element is $6.645 \mathrm{x} {10}^{-23}$$\mathrm{g}$. How many moles of element are there in $0.320 \mathrm{Kg}$ .

What do you understand by the term mole.

Total number of electrons present in $1.7 \mathrm{g}$ of ammonia is

Which of the following compound(s) has /have percentage of carbon same as that in ethylene $\left({\mathrm{C}}_2{\mathrm{H}}_4\right)$?

Which of the following contain the same number of carbon atoms as in $6 \mathrm{g}$ of carbon-$12$?

The mass of a gas that occupies a volume of $612.5 \mathrm{mL}$ at room temperature and pressure ($25°\mathrm{C}$ and $1\mathrm{atm}$ pressure) is $1.1 \mathrm{g}$. The molar mass of the gas is

Two $22.4$ litre containers $\mathrm{A}$ and $\mathrm{B}$ contains $8 \mathrm{g}$ of ${\mathrm{O}}_2$ and $8 \mathrm{g}$ of ${\mathrm{SO}}_2$ respectively at $273 \mathrm{K}$ and $1 \mathrm{atm}$ pressure, then

If Avogadro number were changed from $6.022 \times {10}^{23} \mathrm{to} 6.022 \times {10}^{20}$, this would change

$7.5 \mathrm{g}$ of a gas occupies a volume of $5.6$ litres at $0 °\mathrm{C}$ and $1\mathrm{atm}$ pressure. The gas is

Which one of the following represents $180 \mathrm{g}$ of water?

When $22.4$ litres of ${\mathrm{H}}_2 \left(\mathrm{g}\right)$ is mixed with $11.2$ litres of ${\mathrm{Cl}}_2 \left(\mathrm{g}\right)$, each at $273 \mathrm{K}$ and $1 \mathrm{atm}$ the moles of $\mathrm{HCl} \left(\mathrm{g}\right)$, formed is equal to

When $6.3 \mathrm{g}$ of sodium bicarbonate is added to $30 \mathrm{g}$ of acetic acid solution, the residual solution is found to weigh $33 \mathrm{g}$. The number of moles of carbon dioxide released in the reaction is 

The number of water molecules in a drop of water weighing $0.018 \mathrm{g}$ is