Given the balanced equation 2(h2 s) + 3(o2) = 2(s o2) + (h2 o)
what is the correct mole ratio set?
h2 s: s o2 = 2: 2 , o2: h2 o
2: 2, 3: 2
2: 3, 3: 2
4: 4, 5: 4
4: 6, 4: 4

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.