Write the formulae for the following and calculate the molecular mass for each one:-
a)Caustis Potash
b)Baking Powder
c)Lime Stone
d)Caustic Soda
e) Ethanol
f) Common Salt

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Solution

$a) C a u s t i c p o t a s h - K O H - 39 + 16 + 1 = 56 g b) B a k i n g p o w d e r - N a H C O_{3} - 23 + 1 + 12 + 3 \times 16 = 84 g c) L i m e s t o n e - C a C O_{3} = 40 + 12 + 3 \times 16 = 100 g d) C a u s t i c s o d a - N a O H - 23 + 1 + 16 = 40 g e) E t h a n o l - C_{2} H_{5} O H - 2 \times 12 + 6 + 16 = 46 f) C o m m o n s a l t - N a C l - 23 + 35.5 = 58.5 g$

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