The table lists density calculations based on measurements students made. the accepted
value of the density is 1.17 g/mL. determine the
percentage error of each measurement.
measured density
(g/mL)
Sample
Percentage error (%)
1- 1.05
2- 1.12
3- 1.31
4- 1.24

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.