Pls i don’t understand chemistry that much and it’s due tomorrow. picture above

4. 1.07x10²⁴ molecules CoCl2

5. 7.95 x 10²³ molecules CCl4

6. 1.32x10²³ molecules LiCl

7. 3.96 x10²⁴ molecules NH4OH

8. 1.81 x10²² molecules NH4SO2

Explanation: Solution attached.

First convert mass to moles by using the molar mass of the compound then convert to molecules using Avogadro's number.

they are both synthetic elements

explanation:

d

it's c. elements are placed in rows based on how may valencies electrons have.