Answer to Question #107268 in General Chemistry for Monica

Question

How many moles would 7.95x 1022 atoms of Ca be?

Answer 1

Question: How many moles would 7.95x 1022 atoms of Ca be?

Answer:

N_a=6.02x10²³mol⁻¹ - Avogadro constant - the namber of he number of constituent particles (atoms in our case) that are contained in one mole of a substance (Ca - calcium in our case).

n=N_Ca /N_a - Calcium amount of substance in the sample. N_Ca=7.95x10²²

n=7.95x10²² / 6.02x10²³mol⁻¹=0.132mol

So, 0.132mol