Question

A tank contains helium gas at 490 mmHg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm? 2.1 atm 0.55 atm 1.0 × 103 atm 1.5 atm 1600 atm

Answer 1

The total pressure in the tank is obtained by converting all partial pressures to atmospheres and then adding them up according to Dalton's Law. The total pressure is 2.1 atm.

Step-by-step explanation:

To calculate the total pressure in the tank, we must first make sure all pressures are in the same unit. Since atmospheric pressure is often used in physics and chemistry, we'll convert all pressures to atm:

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Now we use Dalton's Law of Partial Pressures, which states that the total pressure is the sum of the partial pressures of individual gases:

Total Pressure = PHe + PN + PNe = 0.645 atm + 0.75 atm + 0.684 atm = 2.079 atm

Therefore, the total pressure in the tank is closest to 2.1 atm, which is one of the options provided.

Answer 2

2.1atm

Step-by-step explanation:

The following were obtained from the question:

P(He) = 490mmHg

Recall: 760mmHg = 1atm

490mmHg = 490/760 = 0.64atm

P(N2) = 0.75 atm

P(Ne) = 520 torr

Recall: 760torr = 1atm

520torr = 520/760 = 0.68atm

Total pressure = P(He) + P(N2) + P(Ne)

Total pressure = 0.64 + 0.75 + 0.68

Total pressure = 2.07 = 2.1atm