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Q.

If the relative atomic mass of oxygen is 64 units, the molecular mass of CO becomes

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a

7

b

112

c

28

d

128

answer is A.

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Detailed Solution

The relative atomic mass of oxygen = 64 units

 The molecular weight of oxygen = 16 u

 The molecular weight of carbon monoxide = 28 u

The relative atomic mass of carbon monoxide =X=?

X = 64/16 × 28 = 112

X = 112

Hence, the relative atomic mass of carbon monoxide = 112.

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