Which numerical setup can be used to calculate the heat energy required to completely melt 83.5 grams of H2O(s) at 0°C?

What is the percent by mass of oxygen in fe2o3

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next