What weight of 60% pure sulphuric acid is required to decompose 25 gram of chalk

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.

1) according to the law of conservation of mass ,in all chemical reactions total mass is unchanged

A. is your answer.  hope this  

The answer to this question is a