### Calculating the effect of pressure on solubility

The solubility of CO2 in water at 25°C and 1 atm is 0.034 mol/L. What is its solubility under atmospheric conditions? (The partial pressure of CO2 in air is 0.0003 atm.) Assume that CO2 obeys Henry's law. I can't seem to get this problem correct. I believe I am to find the product of .034x.0003 which gives me 1.02e-5.