Calculate the number of atoms in 0.377 grams of ar

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!

The correct answer is c b c a d

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.