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Q.

What’s the molecular mass of carbon dioxide? (Atomic mass of carbon is 12 and the atomic mass of  oxygen is 16)

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a

43

b

28

c

44

d

40

answer is C.

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Detailed Solution

Carbon has an individual mass of 12 u, while oxygen has a mass of 16 u. CO2 is the chemical formula for carbon dioxide.

Molecular mass = 1 X atomic mass of Carbon + 2 X atomic mass of oxygen

=  1X 12 +  2 X 16

=    12+32

= 44u

The molecular mass of CO2  is 44u.

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