The ratio of the vapor pressure of the air in equilibrium with a substance to the vapor pressure of pure water is known as
A. water activity.
B. vapor activity.
C. positive water balance.
D. osmosis.
Answer:A
The ratio of the vapor pressure of the air in equilibrium with a substance to the vapor pressure of pure water is known as
A. water activity. B. vapor activity. C. positive water balance. D. osmosis.