Justus has a flexible container that holds 200 milliliters of air at a temperature of 300 kelvins and a pressure of 100 kilopascals. Justus wants to decrease the volume of the air inside the container to 100 milliliters. He can do this either by changing the temperature to kelvins or by changing the pressure to kilopascals.

a chemical reaction

explanation:

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.

the answer is symmetrical : )

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.