Molecular Mass and Mole Concept

Which has more number of atoms, $50\mathrm{g}$ sodium or $50\mathrm{g}$ of calcium? (Given atomic mass of $\mathrm{Na}=23\mathrm{u},\mathrm{Ca}=40\mathrm{u}$) 

The mass of a single atom M is $3.05\times {10}^{-22}\mathrm{g}$. What is its atomic mass?

What mass in grams is represented by $3$ mole of ${\mathrm{NH}}_3$?

What mass in grams is represented by $0.44$ mole of ${\mathrm{CO}}_2$?

Calculate the gram molecular mass of ${\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3$. (Atomic mass of $\mathrm{Al}=27,\mathrm{S}=32$)

Calculate the formula unit masses of $\mathrm{CaO},{\mathrm{K}}_2{\mathrm{CO}}_3,{\mathrm{NaHCO}}_3,{\mathrm{H}}_2{\mathrm{SO}}_4$.

Calculate the molecular masses of $\mathrm{C}{\mathrm{l}}_2,\mathrm{C}{\mathrm{O}}_2,\mathrm{C}{\mathrm{H}}_4, \mathrm{N}{\mathrm{H}}_3,{\mathrm{C}}_2{\mathrm{H}}_6$.
 

Calculate the number of potassium ions present in $7.45\mathrm{g}$ of potassium oxide. (Atomic mass of $\mathrm{K}=39\mathrm{u}$) 

What is the mass of $0.5$ mole of water molecules.

What is the mass of $0.2$ mole of chlorine$\left({\mathrm{Cl}}_2\right)$gas.

Convert $22\mathrm{g}$ of carbon dioxide into moles.

Convert $15\mathrm{g}$ of water into moles.

Convert $12\mathrm{g}$ of nitrogen gas into moles.

How many atoms are there in $0.24$ mole of oxygen$\left({\mathrm{O}}_2\right)$?

Define mole.

Calculate the formula unit masses of sodium hydrogen carbonate.

Calculate the formula unit masses of calcium chloride.

Calculate the molecular masses of Ferrous sulphate(hydrated)$\left({\mathrm{FeSO}}_4.7{\mathrm{H}}_2\mathrm{O}\right)$.

Calculate the molecular masses of Acetic acid$\left({\mathrm{CH}}_3\mathrm{COOH}\right)$. 

Calculate the molecular mass of Ethanol$\left({\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\right)$.