Question

calculate the number of particles in 46g of O² atoms​

Answer 1

moles = mass given ÷molecular mass

moles = 46÷ 32 =1.43

no. of particles =moles × na

$6.022 \times {10}^{23} \times 1.43$

=8.65× 10^23

Answer 2

one mole=6.022×10^23 particles

Molecular mass of 02=16×2=32u=32g

Therefore 46g=46/32=1.43 moles

no. of particles=1.43×6.022×10^23

=8.611×10^23 particles