How many atoms are here in the following?

a. 3n2
b. 2h2o
c. 4hno3
d. 2ca(oh)2
e. 3ba(clo3)2
f. 5fe(no3)2
g. 4mg3(po4)2
h. 2(nh4)2so4
i. 6al2(seo4)3
j. 4c3h8

A. 6N

B. 4H, 2O

C. 4H, 4N, 12O

D. 2Ca, 4O, 4H

E. 3Ba, 6Cl, 18O

F. 5Fe, 10N, 30O

G. 12Mg, 8P, 32O

H. 4N, 16H, 2S, 8O

I. 12Al, 18Se, 72O

J. 12C, 32H

I am 90% sure this is correct

answerca air mass;