Question

What is the no of o-atom in 126amu of hno3?

Answer 1

Explanation:

First find out the mole

hno3 molecular mass is 1+14+48=63

126/63=2 moles

Now one oxygen atom contains 3 atoms

so 2×3=6

NA/6=0.99×10^23=9.9×10^24

Answer 2

Answer:

6

Explanation: