The atomic mass of two elements A and B is 40 and 80 respectively. If x g of A contains y atoms, how many atoms are present in 2x g of B?
I have tried to solve by assuming that
- x g of A has y atoms
- so x g of B has 2y atoms, because atomic weight of B is 2 times higher than A
- so 2x g of B contains 4 y atoms.
But the answer key says it was wrong, the correct answer is y. What am I doing wrong?