Determine the Henry's law constant for ammonia in water at 25°C if an ammonia pressure of 0.022 atm produces a solution with a concentration of 1.3 M.

Understand Henry's Law, which states that the concentration of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. The formula is given by: $C=k{H}_{}P$, where $C$ is the concentration of the gas, $k{H}_{}$ is the Henry's law constant, and $P$ is the partial pressure of the gas.