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What’s the molecular mass of carbon dioxide?

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in Chemistry – Class 11 by (148k points)
What’s the molecular mass of carbon dioxide?

(a) 43

(b) 28

(c) 44

(d) 40

The question was posed to me in exam.

This interesting question is from Atomic and Molecular Masses topic in section Chemistry Basic Concepts of Chemistry – Class 11

1 Answer

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The correct option is (c) 44

To explain: The individual mass of carbon is 12 amu and the individual mass of oxygen is 16 amu. The formula for carbon dioxide is CO2. Thus one carbon and two oxygens. 12(carbon M.wt) + 2 x 16(oxygen M.wts) = 12 + 32 = 44. Therefore the molecular mass of carbon dioxide is 44.

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