chemistry help?

Question

Which of the following is clearly a polyatomic ion?

A. C6 H12 O6

B.NH4

C.NaN3


2.if the gram molecular mass of carbon is 12 and the gram molecular mass of chlorine is 35 , the gram mass of one molar mass of carbon tatrachloride must be?

A.47
B.83
C.125
D.196

Answer 1

1st question B NH4+1 is the ammonium ion
2nd question... answer not given
Carbontrtrachloride is CCl4..1 carbon atom and 4 chlorine atoms


1 carbon = 12
4 chlorine = 140
Total 152 for the gram molar mass


by the way chlorine is usually 35.5 for the gram molecular mass making the real answer 154