Question

Calculate the number of atoms in 0.377 grams of ar

Answer 1

Molar mass Argon ( Ar ) = 39.95 g/mol

39.95 g ---------------- 6.02 x 10²³ atoms
0.377 g ---------------- ( atoms Ar )

( atoms Ar ) = 0.377 x ( 6.02 x 10²³ ) / 39.95

( atoms Ar ) = 2.26954 x 10²³ / 39.95

= 5.68 x 10²¹ atoms Ar

hope this helps!