Whats the molar mass of the compound and the molecular formula of the compound

Question

a compound containing nitrogen and oxygen has empirical formula No2 A 2.30g gaseous sample of the compound occupies volume of 1.74L at 150 degrees celcius and 100kPa

whats the molar mass of the compound and the molecular formula of the compound

Answer 1

Theoretically NO2 has a molecular weight of:

N = 14

O = 2 x 16 = 32

NO2 = 46g/mole

From the given data, using the ideal gas law which is:

PV = nRT or

PV = mRT/M

where;

m = mass of the substance

M = Molecular weight of the substance

then;

M = mRT/PV

     = 46.485 gram/mole (molar mass)

hence;

Molecular formula = molar mass / mass of emperical formula

                           =  1

Molecular formula is the same as the emperical formula

Answer 2

Molar mass is the weight of the huge tooth that falls off after a dental extraction.

Just put the darned thing on a weighing scale.

Answer 3

the molar mass of NO2 is

14.0067(nitrogen) + 2(15.994) (2 oxygen atoms) = 45.9947 g/mol