The volume of a sample of hydrogen gas was decreased from 14.65 l to 7.94 l at constant temperature. if the final pressure exerted by the hydrogen gas sample was 5.02 atm, what pressure did the hydrogen gas exert before its volume was decreased?

The pressure the hydrogen gas exerted before its volume was decreased is 2.7207 atm.

Explanation:

Using Boyle's law

Given ,  

V₁ = 14.65 L

V₂ = 7.94 L

P₁ = ?

P₂ = 5.02 atm

Using above equation as:

The pressure the hydrogen gas exerted before its volume was decreased is 2.7207 atm.

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.