When 23.5-g of ammonium nitrate is dissolved in water it cools 1000.0-g of water from 32.3°C to 27.5°C. What is the value of ΔH

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.

Determine type of reaction & predict the product c3h12+o2 =

Where are the noble gases located in the periodic table? a. in the center b. on the left side c. in the upper right corner d. on the far right side