Answer to Question #155711 in General Chemistry for Denna Macfine

Question

A 25.0 L tank contains 2.0kg of neon gas with a pressure of 98.0 atm at 28°C. How many kilograms of O₂ can fill the tank under the same pressure and temperature? Using avogadros law.

Answer 1

According to Avogadro's Law, under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules.

Thus,

Moles of Neon $= \dfrac{mass}{molar mass} = \dfrac{(2.0x1000)g}{20.1797g/mol} = 99.1095mol$

Since Oxygen will have the same number of moles under similar conditions, then we have;

Mass of Oxygen = Moles x molar mass

= 99.1095mol x 15.990g/mol

= 1585.652g

= 1.59Kg