8/30 Concept Test Questions

1. Which equation best represents the change that takes place when water is electrolyzed?
A) H₂O(l) -> H₂O(g)
B) H₂O(g) -> H₂O(l)
C) 2H₂O(l) -> 2H₂(g) + O₂(g)
D) 2H₂(g) + O₂(g) -> 2H₂O(l)

2. In which of these measured values are the zeros not significant figures?
I) 0.0591 cm
II) 504 g
III) 2.70 m
IV) 5300 L

A) I and II
B) II and III
C) I and IV
D) I, III, and IV
E) II, III, and IV