Chemistry 5070 · O Level · Relative masses of atoms and molecules

Relative masses of atoms and molecules — practice question

The diagram illustrates the structures of the atoms of two elements, X and Z. X and Z are not the atomic symbols used for these elements. The elements combine to make a compound. What is the mass of 1 mole of this compound?

A11 g
B12 g
C23 g
D30 g

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