PDF chapter test TRY NOW
Write brief answers to the following question:
Write the formulae for the following and calculate the molecular mass for each one of them.
(a). Caustic potash
Formulae : \(KOH\)
(39 +16+1) = g \(mol^-{^1}\).
(b). Baking powder
Formulae : \(NaHCO_3\)
23 + 1 + 12 + (3 × 16) = g \(mol^-{^1}\).
(c). Lime stone
Formulae : \(CaCO_3\)
40 + 12 + (3 × 16) = g \(mol^-{^1}\).
(d). Caustic soda
Formulae : \(NaOH\)
23+16+1 = g \(mol^-{^1}\).
(e). Ethanol
Formulae : \(C_2H_5OH\) = \(C_2H_6O\)
2 × 12 + (6 × 1) + 16 = g \(mol^-{^1}\).
(f). Common salt
Formulae : \(NaCl\)
23 + 35.5 = g \(mol^-{^1}\).