Help please|| will mark brainlest || 10 pts <3 In which equation is carbon dioxide a product?
Group of answer choices

CH4 + 2O2 --> CO2 + 2H2O

CO2 --> C + O2

2H2O --> 2H2 + O2

6CO2 + 6H2O --> C6H12O6 +

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules

Which terms are used to identify pure substances

Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite