TOPIC 9. CHEMICAL CALCULATIONS III - stoichiometry.

Ratios: 2 "molecules" 1 molecule "1 molecule" 1 molecule therefore 2 moles 1 mole 1 mole 1 mole from which, IX - 3 1 mole of the known, Na 2 CO 3, requires 2 moles of the unknown, NaOH. Amount of Na 2 CO 3 in 53.0 g = mass mole molar mass = 53.0 = 0.500 mole ... ................
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