Question

Q1) Calculate the number of atoms in 30g of calcium & magnesium respectively. Find out which has more atoms & how many? (Ca=40, Mg = 24)

Q2) What is the mass of 10 moles of HNO3 ( H = 1, N= 14, O = 16)

No spam answers. I will follow the correct ones.
​

Answer 1

Explanation:

Q1

For calcium:30/40× 6.022×10^23=0.75×6.022×10^23

For Magnesium:30/24×10^23=1.25×6.022×10^23

Mg has more atoms =(1.25-075)×6.022×10^23

Q2

HNO3 molecular mass = 63u

For 10 moles of HNO3=63× 10= 630 g