11. What is the gram formula mass of chromic sulfate, Cr2(SO4)3?
8.148.19
C. 344.2 g
D. 392.29

12. What is the mass in grams of 5.90 mol C8H18?
B.0.0512 g
C.19.4 g
D. 389 9

13. What is the number of moles in 0.025 g (NH4)2Cr207?
A 15 x 1022
B.4.2 x 10-26 C.6.3
D.1.0 x 10-4 E 1.0 x 104

14 What is the volume of 2.8 moles of NO2 gas at STP?
A 1500 L
B.0.13 L
C. 63 L
D. SOL

15. How many grams are in 0.90 mol Pd?
A. 0.009469 B. 106.4 g
C. 0.900 g
D. 1.80 9​