1. the types of trace elements in organic compounds.

2. how compounds in different types of organisms can be used to benefit people.

3. describe what is meant when water is called a polar molecule.

d. sodium chloride ions.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

if, i suppose that a bee stings me swinging my hand away from a bee. then that if, i persist patient when a bee or wasp areas on your surface to investigate a scent or to take h2o and i secreting heavily, the bug ultimately will move of its personal agreement. if i don't need to set for it to disappear, lightly and gently wipe it off with a part of the paper.