Question

Mass of 2 × 1023 atoms of an element (atomic mass = 32 amu) is

Answer 1

Explanation:

no.of particle=2×10^23

mol×NA=2×10^23

no.ofparticle÷NA=mol

2×10^23÷NA=0.3

mass÷Molarmass=mol

mass=mol×Molarmass

0.3×32=10.6g

Answer 2

Answer:

Explanation:

no of atoms= moles × Na ( avogadro's no. = 6.02 × 10²³)

       2 × 10²³=  6.02 × 10²³ × moles

        moles =0.33

moles = mass / molar mass

0.33 = mass/ 32

mass = 0.33 × 32

        = 10.56 g