It is equal to 1 for all substances.
A. 1 and 2 only
B. 2 and 3 only
C. 1 and 3 only
D. 1, 2 and 3
Answer:A
It is equal to 1 for all substances.
A. 1 and 2 only B. 2 and 3 only C. 1 and 3 only D. 1, 2 and 3