Q.

The ratio of the mass of 100 billion atoms of magnesium to the mass of 100 billion 24 atoms of lead can be expressed as - 24207

Atomic weights are relative masses.

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a

Both (A) and (R) are true but (R) is not the correct explanation of (A)

b

Both (A) and (R) are true and (R) is the correct explanation of (A)

c

Both (A) and (R) are false

d

(A) is true but (R) is false

answer is B.

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Detailed Solution

The ratio of the mass of 100 billion atoms of magnesium to the mass of 100 billion atoms of lead can be expressed as.
The mass ratios of Mg to Pb= ratio of atomic masses=27207   (since the number of atoms is the same)
Hence, option B is correct.

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The ratio of the mass of 100 billion atoms of magnesium to the mass of 100 billion 24 atoms of lead can be expressed as - 24207Atomic weights are relative masses.