18. c
19. A
20. decomposition reaction
21. 4
22. 0.04%
NaCl consists of a salt, which is a nonmetal (Na) and Cl, which is a metal. When a nonmetal and a metal are combined, it makes the compound ionic.
Answer:
mosquitoes
Explanation:
theyre being killed by the thiusands every day
First, you need to change meter to centimeter. So the volume is 1000*100*1=10^5 cm3. And the mass is 0.62*10^5=6.2 *10^4 g.