PV = nRT
Where n is the number of moles of the number of moles and R is a constant called the universal gas constant and is equal to approximately 0.0821 L-atm / mole-K.
1.7 * 1.5 = n (.0821) (24+273.15)
n = (1.7 *1.5) / ((.0821 * (24+273.15))
= 2.55/24.396
n= .10452 moles