What is the solubility of phosphine (in units of grams per liter) in water at 25 °C, when the PH₃ gas over the solution has a partial pressure of 0.279 atm? KH for PH₃ at 25 °C is 8.10×10⁻³ mol/L⋅atm.
a) [PH₃] = 0.279 g/L
b) [PH₃] = 0.279 × 8.10 × 10⁻³ g/L
c) [PH₃] = 8.10 × 10⁻³ g/L
d) [PH₃] = 1/0.279 g/L