The number of moles of a substance in a container can be calculated using the Ideal Gas Law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in kelvins.
First, we need to convert the temperature from degrees Celsius to kelvins:
T (K) = T (°C) + 273.15 = 26.0°C + 273.15 = 299.15 K
Next, we can plug in the values into the Ideal Gas Law and solve for n:
PV = nRT
n = (PV) / (RT) = (501 torr * 1.45 L) / (0.0821 Latm/molK * 299.15 K)
The final answer will be in moles. Note that 1 torr = 1 atm / 760.
n = (501 torr * 1.45 L) / (0.0821 Latm/molK * 299.15 K)
= (501 torr * 1.45 L / 760) / (0.0821 Latm/molK * 299.15 K)
= 0.501 * 1.45 / (0.0821 * 299.15)
= 0.501 * 1.45 / (0.0821 * 299.15)
You can perform the calculation to get the exact number of moles.