calculate the number of moles there are when a gas occupies a volume of 3.95L at 37 degrees C and .985 atm

PV = nRT

23 To calculate the number of moles, we can use the ideal gas law equation:

PV = nRT

Where:
P = Pressure (in atm)
V = Volume (in liters)
n = Number of moles
R = Ideal gas constant (0.0821 L·atm/(mol·K))
T = Temperature (in Kelvin)

First, let's convert the given temperature in degrees Celsius to Kelvin by adding 273.15:
T = 37 + 273.15 = 310.15 K

Now, we can plug the values into the ideal gas law equation and solve for n:

PV = nRT

n = (PV) / (RT)

n = (0.985 atm * 3.95 L) / (0.0821 L·atm/(mol·K) * 310.15 K)

n ≈ 0.163 moles

Therefore, there are approximately 0.163 moles of gas in a volume of 3.95 L at 37 degrees Celsius and 0.985 atm.