Question

Calculate the molar mass of the following:
(i) H,O (ii) CO, (iii) CH,
per cent of different elem
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Answer 1

Answer:

H2O = 1X2+16=18

CO2= 12+16X2=44

Step-by-step explanation:

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Answer 2

Answer:

The molar mass (also called molecular mass) of Hydrogen (H) is 1u, Carbon (C) is 12u and Oxygen (O) is 16u.

i) $H_{2}$O (Water):

Molar mass = (2 x 1) + (1 x 16) =  2 + 16 = 18u

ii) $CO_{2}$ (Carbon Dioxide):

Molar mass = (1 x 12) + (2 x 16) = 12 + 32 = 44u

iii) $CH_{3}$ (Methane):

Molar mass = (1 x 12) + (3 x 1) = 12 + 3 = 15u

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