Another genchem kaplan question

[topdent1]

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An ideal gas is contained in a one-liter vessel at 350 K. What additional information is sufficient to determine the pressure of the gas?

A. the molecular weight of the gas

B. the number of gas molecules

C. the molecular weight and the mass of the gas

D. B or C

E. A, B, or C

The problem doesn't state that it is at STP. In addition, 350K and 1L are not STP values. So..how can answer choice B (and C) be the correct answer? Wouldn't you need to be at STP for it to work?

 

[slick90210]

An ideal gas is contained in a one-liter vessel at 350 K. What additional information is sufficient to determine the pressure of the gas?

A. the molecular weight of the gas

B. the number of gas molecules

C. the molecular weight and the mass of the gas

D. B or C

E. A, B, or C

The problem doesn't state that it is at STP. In addition, 350K and 1L are not STP values. So..how can answer choice B (and C) be the correct answer? Wouldn't you need to be at STP for it to work?

From my understanding if you wanted to put this question into PV=nRT
you would need the number of moles. For moles all you would need is the number of gas molecules, using Avogadro's number solve for n.