What is the density of NH3 at 67°c and 800 torr

Answer 1

Density is defined as mass/volume, usually in g/ml or g/L.

We can use the ideal gas law to find moles of NH3, and then convert that to grams of NH3. We will assume that we have 1 liter of NH3.

PV = nRT

solving for moles (n), we have n = PV/RT

n = moles = ?

P = pressure = 800 torr x 1 atm/760 torr = 1.053 atm

V = volume in liters = 1 liter

R = gas constant = 0.0821 Latm/Kmol

T = temperature in Kelvin = 67C + 273 = 340K

n = PV/RT = (1.053)(1)/(0.0821)(340)

n = 0.0377 moles NH3

mass NH3 = 0.0377 moles x 17 g/mol = 0.641 g

Since this is in 1 liter, the density = 0.641 g/liter