Write a brief explanation of why salt must be added to the ice bath for the determination of the freezing point of your solution of sodium chloride in water.

The answer is b i think

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.