Matching Set 1 3. the impression of an organism in a rock
4. the fossil copy of an organism in a rock
5. the preserved evidence of the activity of an
organism
6. the preserved tissues of an organism
B. original-material fossil
C. trace fossil
D. mold
ompanies, Inc.

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.

Iron (fe) reacts with copper sulfate (cuso4) to form iron (ii) sulfate. in this reaction, cu2+ gains electrons to form cu. which statement is true about this reaction? fe(s) + cuso4(aq) → feso4(aq) + cu(s)

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate