Question

Calculate the numbers of atoms present in 20g of calcium​

Answer 1

Answer:

3.011*10 to the power -23

Explanation:

Number of particles=number of moles*avagadros number

Number of moles=Given weight by gram atomic mass

therfore number of moles=20/40=0.5 moles

number of particles=0.5*avagadros number

=0.5*6.022*10 to the power -23

=3.011*10 to the power -23