A 2.15-m3 rigid tank initially contains air whose density is 1.18 kg/m3. The tank is connected to a high-pressure supply line through a valve. The valve is opened, and air is allowed to enter the tank until the density in the tank rises to 5.30 kg/m3. Determine the mass of air that has entered the tank.

The mass of air that has entered the tank is 8.86Kg

Explanation:

We are given:

We first calculate the intial and final masses,

Therefore:

= 1.18 * 2.15 = 2.54

= 5.30 * 2.15 = 11.4

Therefore to find the mass of air inside the tank, we use:

= 11.4 - 2.54 = 8.86Kg

Therefore the mass of air inside the tank is 8.86Kg

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