What is the pressure exerted by 1.0 mol of a gas with temperature of 20 c and a volume of 7.5 l?

We have to assume the gas behaves similar to an ideal gas and we can use the ideal gas law equation

PV = nRT

Where

P - pressure

V - volume - 7.5 L

n - number of moles - 1.0 mol

R - universal gas constant - 0.0821 L.atm/mol.K

T - temperature in kelvin

20 degrees celcius + 273 = 293 K

Substituting the values in the equation

P x 7.5 L = 1.0 mol x 0.0821 L.atm/mol.K x 293 K

P = 3.2 atm

The pressure exerted is 3.2 atm

oh it is true if thats what you are asking

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.