pounds per hour to scfm

I need to conver 20.2 lbs per hour to scfm can anyone help?
thanks

You need to know the density at the "standard" conditions (the "s" in scfm). The hours and minutes are trivial.

You need to know the density at the "standard" conditions (the "s" in scfm). The hours and minutes are trivial.

gas is nitrogen at approx. 70f can this be used to calculate approx. value?

Yes, that's enough. The density of any gas is

rho = MP/RT

M is the molecular weight, 28.02 u
P is the pressure, 1 atm is normal for "standard conditions"
T is the absolute temperature. 60 °F and 68 °F are the usual "standard" temperatures in english unit gas measure. We'll assume 68 °F and convert it to Rankine, 527.7 R.
R is the gas constant, in English units, is 0.7302 atm-ft^3/(lbmol-R)

rho = 28.02 lb/mol x 1 atm/ (0.7302 atm-ft^3/(lbmol-R) x 527.7 R) = 0.0727 lb/ft^3.

Then 20.2 lb/hr x 1hr/60 min x 1 ft^3/.0727 lbs = 4.63 ft^3/m. Since I used the pressure and temp. of standard conditions, those are scfm.

we found a chart in our rocket service manual you were right
on thanks