Which of the following are decomposition reactions? CH4 (g) + O2 (g) → CO2 (g) + H2O (l) CaO (s) + CO2 (g) → CaCO3 (s) Mg (s) + O2 (g) → MgO (s) PbCO3 (s) → PbO (s) + CO2 (g)

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Can someone me with 1 to 4 plz. fast

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?