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a chemistry student found the density of freon-11 (cfcl3) to be 5.58 g/l under her experimental conditions. her measurements showed that the density of an unknown gas was 4.38 g/l under the same conditions. what is the molar mass of the unknown? a. 96.7 g/mol b. 108 g/mol c. 127 g/mol d. 165 g/mol e. 175 g/mol

Respuesta :

The molar mass of the unknown gas is 96.7g/mol so the correct option is (a).

The molar mass of a synthetic compound is delineated as the mass of a sample of that compound detached from a piece amount relevant that is the number of blemishes within the sample, calculated in moles. The molar mass is a size, not microscopic, characteristic of wealth. Molar mass is of excellent importance when starting an experiment.

Molar mass can be calculated by the under-mentioned:

Density = M*P/R*T ---------->(1)

Density = 4.38g/L

Where,

M = molar mass of gas

P = pressure of the gas

R = universal gas constant

T = temperature (273K)

Therefore,

Molar mass = density * universal gas constant * temperature /pressure

Molar mass = 4.38g/L*.0821 L atm/mol K *273K / 1atm

= 97g/mol

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