6. what is the smallest unsaturated hydrocarbon molecule?
- propene
- ethene
- pentane
7. the equation for thermal decomposition of limestone... (the --> is heat)
- calcium carbonate --> calcium oxide + carbon dioxide
- calcium carbonate --> calcium + carbon
- calcium oxide --> carbon + calcium
8. What is the equation for a reduction reaction?
- metal oxide + oxygen --> metal + carbon dioxide
- metal + oxygen --> metal oxide
- metal + carbon dioxide --> metal + oxygen + carbon
