The equations in terms of particles moles and mass
a. 2PbS +3O2 = 2PbO +2SO2
b. 4HCl +O2 = 2H2O + 2Cl2
a) 2 Molecules of Pbs + 3 molecules of O2 = 2 Molecules of PbO + 2 molecules of SO2
2 Moles of PbS + 3 Moles of O2 = 2 moles of PbO + 2 Moles of SO2
478.6 grams of PbS+ 48 grams of 02 = 446.4 grams + 128 grams SO2
b). 4 molecules of HCl + 1 molecule of oxygen = 2 molecules of water +2 molecules pf Cl2
4 mole of HCl + 1 mole of oxygen = 2 mole of water + 2 moles of Cl2
146.4 grams of HCl + 31.8 grams = 36 grams of H20 + 159.8 grams of Cl2.
Explanation:
Calculation of:
particles =?
moles =?
mass =?
Equation given:
a) 2PbS +3O2 = 2PbO +2SO2
2 Molecules of Pbs + 3 molecules of O2 = 2 Molecules of PbO + 2 molecules of SO2
2 Moles of PbS + 3 Moles of O2 = 2 moles of PbO + 2 Moles of SO2
Mass of the reactant and product is calculated as:
number of moles x atomic mass
so,
atomic mass of PbS =239.3 grams/mole
mass = 2 x 239.3
= 478.6 grams
atomic mass of O2 = 16 grams/mole
mass = 3 x 16
= 48 grams
atomic mass of PbO = 223.2 grams/mole
mass = 2 x 223.2
= 446.4 grams
atomic mass of SO2 = 64 grams/mole
mass = 2 x 64
= 128 grams
b) Calculation of:
particles =?
moles =?
mass =?
Equation given:
4HCl +O2 = 2H2O + 2Cl2
4 molecules of HCl + 1 molecule of oxygen = 2 molecules of water +2 molecules pf Cl2
4 mole of HCl + 1 mole of oxygen = 2 mole of water + 2 moles of Cl2
To calculate mass, formula used is
mass = number of moles x atomic mass
atomic mass of HCl =36.46 gram/mole
mass = 4 x 36.46 = 146.4 grams
atomic mass of oxygen
mass = 2x 15.9 = 31.8 grams
atomic mass of water = 18 grams,mole
mass = 2 x 18 = 36 grams
atomic mass of Cl2 = 79.90 grams/mole
mass = 2 x 79.90 = 159.8 grams
