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  • Write the formulae for the following and calculate the molecular mass for each one of them. (a) Caustic potash (b) Baking powder (c) Lime stone (d) Caustic soda (e) Ethanol (f) Common salt

Write the formulae for the following and calculate the molecular mass for each one of them.

(a) Caustic potash
(b) Baking powder
(c) Lime stone
(d) Caustic soda
(e) Ethanol
(f) Common salt

Answers (1)

Answer:

(a) KOH = 39 + 16 + 1 = 56 u
(b) NaHCO_{3} = 23 + 1 + 12 + 3 \times 16 = 84 u
(c) CaCO_3= 40 +12+ 3\times 16 = 100u
(d) NaOH = 23 + 16 + 1 = 40 u
(e) C_{2}H_{5}OH = 2 \times 12 + 6 \times 1 + 16 = 46 u
(f) NaCl = 23 + 35.5 = 58.5 u

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