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

2.8 g of N$_{2(g)}$ and 0.8 g of H$_{2(g)}$ are allowed to react completely. What is the mass of NH$_{3(g)}$ formed? (molar mass of N$_{2(g)}$=28, H$_{2(g)}$=2 and NH$_{3(g)}$=17)}

$3.0,g$ of a salt of molecular weight $30$ is dissolved in $250,mL$ of water. The molarity of the solution is

Ten grams of calcium carbonate which is only 90% pure is treated with excess hydrochloric acid. What is the mass of $CO_{2}$ gas liberated? (Atomic mass: $Ca=40$, $C=12$ & $O=16$) ________.