Question

what type of reaction is the electrolysis of water? $2h_2o \
ightarrow 2h_2 + o_2$ single replacement decomposition reaction double replacement synthesis reaction 4) choose the best answer. a student observes the combustion reaction of methane ($ch_4$) upon lighting a bunsen burner. which best describes the products of the reaction? carbon and water oxygen and water carbon dioxide and water oxygen and carbon

Explanation:

For the first question: A decomposition reaction breaks one compound into simpler substances. The reaction $2H_2O
ightarrow 2H_2 + O_2$ splits water into hydrogen and oxygen, fitting this definition.
For the second question: The balanced combustion reaction of methane is $CH_4 + 2O_2
ightarrow CO_2 + 2H_2O$, so the products are carbon dioxide and water.

Answer:

1. decomposition reaction
2. carbon dioxide and water