Question

How many grams of Nitrogen (N2) are in a tank with a gauge pressure of 8 atmospheres, a volume of 14 liters and a temperature of 60 degrees C. (Atomic Mass of Nitrogen (N) is 14 g/mol)

	114.655021 grams
		636.622006 grams
		128.986899 grams
		716.199756 grams

Answer 1

let there be n moles of N2 in the tank

it is given that

gauge pressure = 8 atmospheres

volume =14 liters and

temperature = 60 degrees C. = (273.15+60 )Kelvin =333.15 kelvin

according to ideal gas equation

(preessure)(volume)=(no. of moles )(gas contant )(temperature)

so , 8 X 14 =n X0.0821 X 333.15

n =4.0948221887447moles

we know that 1 mole =28 gram of N2

so n moles =4.0948221887447X 28 grams of N2 = 114.65502128 grams of N2

so, grams of Nitrogen (N2) are in a tank =114.65502128 grams

114.655021 grams