Question

The atomic weight of two elements A and B are 30 and 60 respectively. If x gram of A contains z atoms, how many atoms are present in 2x g of B?

• A. $\frac{z}{2}$
• B. $\frac{z}{4}$
• C. $z$
• D. $2z$

Answer 1

The correct option is C $z$

Moles of $A=\frac{x}{30}$
Moles of $B=\frac{2x}{60}$
So if no. of moles is same then no. of atom will also be same.