Question

Can someone help solve this for me showing the work? I'm stuck, I'd appreciate it.

Answer 1

first, molecular mass of Zn=65 g

molecular mass of HNO3=63 g

in the given reaction,

10 × 63 g HNO3 reacts with 4×65 g Zn.

i.e. 1.49 g HNO3 reacts with (260/630) ×1.49

=0.61 g Zn.

now the number of moles in Zn is

given mass/ molecular mass=0.61/65=0.0093 moles

Again,

no. of atoms= 0.0093× 6.023×+0^23

=5.6×10^21 atoms