A balloon contains an anesthetic mixture of cyclopropane (cp)and oxygen (O₂)at 171 torr and 570.torr,respectively.What is the ratio of the number of moles of cyclopropane to moles of oxygen? A)3.33 B)0.230 C)0.300 D)0.390 E)0.460

Question

Quizplus · Accepted Answer

We can use the formula:

P1V1 = n1RT and P2V2 = n2RT

where P is pressure, V is volume, n is moles, R is the gas constant and T is temperature (which is assumed to be constant in this problem).

Rearranging the equations and dividing gives:

n1/n2 = (P1V1)/(P2V2)

Plugging in the values:

n1/n2 = (171 torr)(1 L)/(570 torr)(1 L) = 0.3

Therefore, the ratio of the number of moles of cyclopropane to moles of oxygen is 0.3, or 3 moles of cyclopropane for every 10 moles of oxygen. The answer is choice C.

A Balloon Contains an Anesthetic Mixture of Cyclopropane (Cp)and Oxygen