The atomic masses of two elements A and B are 30 and 90 respectively

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

The atomic masses of two elements A and B are 30 and 90 respectively. If 'a' g of element A contains 'b' atoms, then number of atoms of B in 2a g is : (1) 2b/32b/3 (2) b/3b/3 (3) b/4b/4 (4) b/2b/2

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