1. A sample of oxygen has a volume of 2.1 L when the pressure is 375 torr, what is the volume when the pressure is 663 torr?

1.2 Liters

Explanation:

Given that,

Original volume of oxygen V1 = 2.1 L

Original pressure of oxygen P1 = 375 torr

New pressure of oxygen P2 = 663 torr

New volume of oxygen V2 = ?

Since pressure and volume are given while temperature is constant, apply the formula for Boyle's law

P1V1 = P2V2

375 torr x 2.1L = 663 torr x V2

787.5 torr L = 663 torr x V2

V2 = 787.5 torr L / 663 torr

V2 = 1.188L (Round the volume to the nearest tenth as in 1.2L)

Thus, the volume of oxygen is 1.2 liters when the pressure is 663 torr.

the answer your looking for is c).