List of top Chemistry Questions on Stoichiometry and Stoichiometric Calculations asked in KEAM

10 g of (90 percent pure) $ \text{CaCO}_3 $, treated with excess of HCl, gives what mass of $ \text{CO}_2 $?

The values of X, Y, and Z in the following chemical equation are respectively:
$ S_8 + X HNO_3 ({conc.}) \rightarrow Y H_2SO_4 + X NO_2 + Z H_2O $

On passing silent electric discharge through oxygen in an ozonizer, $5.5\, mol \%$ of oxygen is converted to ozone. How many moles of $O_2$ and $O_3$ result when $35$ moles of $O_2$ is originally present?

$4\, g$ of copper was dissolved in concentrated nitric acid. The copper nitrate solution on strong heating gave $5\, g$ of its oxide. The equivalent weight of copper is :

20.0 kg of H$_2$(g) and 30 kg of H$_2$(g) are reacted to produce NH₃(g). The amount of NH₃(g). formed is