1- What is the correct number of significant figures in 0.000197?
2- 10.53533
35332222
3.15E-3 g
2.03 g
6.10 g
0.678 g
1.39E3 g
3-
What is the correct answer to the following expression: (879 + 74) × 0.71071?
a. 931.59
b. 677.3066
c. 677
d. 677.307
e. 677.31
4- If 14.8 g N2 and 2.19 g H2 react to produce 1.29 g NH3, what is the percent yield of the reaction?
N2(g) + 3 H2(g) → 2 NH3(g)
0.105 %
7.17 %
10.5 %
954 %
14.3 %
