In 0.4 mole of H2S, how many atoms of H are there?

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.

What is the effect of returning nuclear reactor cooling water back into bodies of water?

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2