Stoichiometry is derived from greek words, “Stoicheion'' means element and'' metron” means measure. Stoichiometry is the study of the quantitative aspects of a chemical change.
Stoichiometry is the calculation of the quantities of reactants and products involved in a chemical reaction. In stoichiometry we try to find the masses, volumes, number of particles, energies etc.. of reactants taking part in a chemical reaction and products formed.
1 mole of a gas = GMW of a gas = 22.4 L at STP
1 mole of a substance = GMW
Question 1: Calculate the number of atoms in 12 g of oxygen gas.
Molar mass of oxygen gas = 32.0 g/mol
Number of atoms in 1 oxygen gas molecule = 2
Question 2: Stoichiometry is derived from greek words, “Stoicheion” means element and“ metron” means _________.
Solution : Stoichiometry is derived from greek words, “Stoicheion” means element and“ metron” means measure
Answer : (d)
Question 3: 1 mole of any gas at STP occupies ___________.
(a) 32 litre
(b) 44 litre
(c) 22.4 litre
(d) All the above
Solution : 1 mole of any gas at STP occupies 22.4 litres.
Answer : (c)