1. What is the pressure on 2.5 L, if the initial pressure was 400 mmHg and the
initial volume was 1.75 L? *

The answer to your question is   P2 = 280 mmHg

Explanation:

Data

Pressure 1 = P1 = 400 mmHg

Volume 1 = V1 = 1.75 L

Pressure 2 = ?

Volume 2 = 2.5 L

Process

1.- Use Boyle's law to solve this problem

                  P1V1 = P2V2

-Solve for P2

                     P2 = P1V1 / V2

2.- Substitution

                    P2 = (400)(1.75) / 2.5

3.- Simplification

                   P2 = 700 / 2.5

4.- Result

                   P2 = 280 mmHg

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.