Which reaction results in only a physical change?

A. 2H2O (l) + electricity ® 2H2 (g) + O2 (g)

B. 2H2O2 (l) ® 2H2O (l) + O2 (g)

C. 2H2 (g) + O2 (g) ® 2H2O (l)

D. H2O (l) + heat ® H2O (g)

You start with 100 grams of zinc how many moles of hydrogen will be produced

Calculate the percent composition of barium in the compound barium chloride, BaCl2.

For a fixed amount of gas at a fixed volume, what will happen if the absolute temperature is doubled?

Calculate the concentration of hydronium and hydroxide ions in a 0.050 M solution of nitric acid.

Select the correct answer. How does activation energy affect a chemical reaction? A. It increases the energy of the reactants. B. It determines how difficult it is to start the reaction. C. It determines how much product can form. D.

If the temperature is constant what change in volume would cause the pressure of an enclosed gas to increase by a factor of 4

For the reaction of carbon with carbon dioxide to make carbon monoxide, one set of conditions produced a Kc = 1.2 * 10-1. At equilibrium at a certain temperature, the concentration of product was 0.60 M.

Water is a colorless and odorless liquid. It can exist in solid, liquid, and gas states. It boils at 100 degrees C and melts at 0 degrees C. Which option best describes this information? A. These are the physical properties of water. B.

What can happen to a supersaturated silution?

What is the source for georthermal energy