Problem: Suppose you are given two 1-L flasks and told that one contains a gas of molar mass 30, the other a gas of molar mass 60, both at the same temperature. The pressure in flask A is X atm, and the mass of gas in the flask is 1.2 g . The pressure in flask B is 0.5X atm, and the mass of gas in that flask is 1.2 g .Which flask contains gas of molar mass 30, and which contains the gas of molar mass 60?

FREE Expert Solution
  • We can establish a relationship between moles of the gases to their P and V using the ideal gas equation
  • Since T and R are constant, we can say that

PV = n 

  • Flask A will appear as PV = n:

n = X*n

  • Flask B will appear as:

n = 0.5X*n

87% (240 ratings)
View Complete Written Solution
Problem Details

Suppose you are given two 1-L flasks and told that one contains a gas of molar mass 30, the other a gas of molar mass 60, both at the same temperature. The pressure in flask A is X atm, and the mass of gas in the flask is 1.2 g . The pressure in flask B is 0.5X atm, and the mass of gas in that flask is 1.2 g .

Which flask contains gas of molar mass 30, and which contains the gas of molar mass 60?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Ideal Gas Law: Molar Mass concept. You can view video lessons to learn The Ideal Gas Law: Molar Mass. Or if you need more The Ideal Gas Law: Molar Mass practice, you can also practice The Ideal Gas Law: Molar Mass practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Pomeroy's class at UCSD.