Question

what will be the density of NH3 gas at 20°C and 750mm og Hg​

Answer 1

Answer:

you don't know the meaning of this so bad

Answer 2

0.759 g/L

The original ideal gas law uses the formula PV = nRT, the density version of the ideal gas law is PM = dRT, where P is pressure measured in atmospheres (atm), T is temperature measured in kelvin (K), R is the ideal gas law constant 0.0821 atm(L)mol(K) just as in the original formula, but M is now the molar mass ( gmol).

Here, PM= nRT

thus, P = 750mm of Hg = 0.98 atm

R = Universal Gas Constant = 0.082 $\frac{L*atm}{mol*K}$

T = 20° C = 293 K

∴ M = molar mass = $\frac{0.0821*293}{0.98}$ g/mol

∴ M = 24.54 g/mol

1 mol of NH3 has 17 g and occupies 22.4 L/mol.

∴ 24.54 g/mol occupies 32.34 L/mol

∴ Density of NH3 = M/V

= 24.54 / 32.34

= 0.7588 g/L

= 0.759 g/L