What type of chemical reaction are these 1. H2 + O2 H2O 2. S8 + O2 SO3
3. HgO Hg + O2
4. Zn + HCl ZnCl2 + H2
5. Na + H2O NaOH + H2
6. C10H16 + Cl2 C + HCl
7. Si2H3 + O2 SiO2 + H2O
8. Fe + O2 Fe2O3
9. C7H6O2 + O2 CO2 + H2O
10. FeS2 + O2 Fe2O3 + SO2
11. Fe2O3 + H2 Fe + H2O
12. K + Br2 KBr
13. C2H2 + O2 CO2 + H2O
14. H2O2 H2O + O2
15. C7H16 + O2 CO2 + H2O
16. SiO2 + HF SiF4 + H2O
17. KClO3 KCl + O2
18. KClO3 KClO4 + KCl
19. P4O10 + H2O H3PO4
20. Sb + O2 Sb4O6

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them  

they are all solids.