What do you understand by the term mole ?

Define equivalent mass.

What do you understand by the term oxidation number ?

Balance the following equations by ion electron method 
\(Zn+{ NO }_{ 3 }^{ - }\longrightarrow { Zn }^{ 2+ }+No\)

Balance the following equations by oxidation number method - \({ K }Mno_{ 4 }+{ Na }_{ 2 }{ So }_{ 3 }\longrightarrow { MnO }_{ 2 }+{ Na }_{ 2 }{ So }_{ 4 }+KOH\)

Balance the following equations by oxidation number method - \(Cu+{ HNO }_{ 3 }\longrightarrow Cu\left( { No }_{ 3 } \right) _{ 2 }+{ No }_{ 2 }+{ H }_{ 2 }O\)

Why atomic masses are called as relative atomic masses?

Calculate the equivalent masses of the following - Crystalline Oxalic acid, H₂C₂O₄ , 2H₂O

Calculate the equivalent masses of the following - Ferrous Sulphate

Calculate the oxidation number of underlined atoms of the following:
S₂O₃^-2

3 grams of hydrogen reacts with 29g of O, to yield H₂O. Calculate the amount of one of the reactants which remains unreacted.

What do you understand by the term stoichiometry of the reaction ?

Calculate the equivalent mass of the following : CO₃^-2,