Why is MnO2 added to the decomposition of H2O2 reaction? A. to increase potential energy B. to increase the net energy of the reaction C. to decrease the activation energy D. to decrease the reaction progress

An engineer is trying to create a fast reaction in a fuel mixture. Which should she do? A. Decrease the amount of fuel B. Lower the temperature of the engine C. Add a catalyst to the fuel mixture D. Lower k for the fuel reaction

Red light with a wavelength of 670.8 nm is emitted when lithium is heated in a flame What is the frequency of this radiation?

Which pair of elements is most likely to form an ionic bond? A:hydrogen and helium B:lithium and potassium C:potassium and iodine D:iron and zinc

A testable explanation that's supported or refuted is called an

62 grams of Zn (C2H3O2) 4 are dissolved to make a 1.5 M solution. How many milliliters of water are needed?

1. Simplify. | A. O 16 B. O C. 04 D. O

What is the (H+), if the pH of a solution is 3.20?

In an open system, the vapor pressure is equal to the outside air pressure. T or F?

Could acetic acid be used in the esterification, instead of acetyl chloride? Why or why not?

9. In a sample of gas, what causes pressure? Answer in a completesentence.