The atomic weights of two elements A and B are 40 and 80 respectively. If x g of A contains y atoms, how many atoms are present in 2x g of B

Question: The atomic weights of two elements A and B are 40 and 80 respectively. If x g of A contains y atoms, how many atoms are present in 2x g of B

(a) 2y

(b) 4y

(c) y 

(d) 2y

Correct Answer: (c) y