If P = 1.5, V = 13, R = 0.082, and T = 290, solve for n in the equation: PV = nRT. *

Answer 1

Let's assume that temperature is 290 K (Kelvin.) If not, you add 273 to Celsius to get K.

Let's also assume that P is 1.5 atmospheres and V is 13 Liters.

The units for R is L-atm/K-mol

Thus, when you solve for n you have n = PV/RT = (1.5 atm)(13 L)/(0.082 L-atm/K-mol)(290K) = moles

Answer 2

Well, you must have units to the numbers for this to make sense. For example, T must be in Kelvins. Is the 120 in K or Celsius? Also, what are the units or P & V? Until all these are established, a meaningful answer can't be given. However, once these are known, simply rearrange the equation (via cross-multiplication) to solve for n, put in the variables with their units, and solve.