The substance, is always produced when an active metal reacts with water.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

The point along a planet's orbit where it is closest to the sun is called the