When you add food coloring to water, is a chemical or physical change?

1. You wish to make a 0.325 M hydrochloric acid solution from a stock solution of 3.00 M hydrochloric acid. How much concentrated acid must you add to obtain a total volume of 50.0 mL of the dilute solution? in ml 2. In the laboratory you dilute 4.

In potassium phosphate what is the percent composition of oxygen? A. 30.2 B. 14.6 C. 55.3 D. 3.3

Where is the energy in a glucose molecule stored? a. in the bonds between the atoms b. inside the carbon atoms c. inside the hydrogen atoms d. inside the protons?

As this reaction takes place at higher temperatures, it is observed that the equilibrium shifts to the product side. The reaction may be written as follows: 2AB2 A2 + 4B + heat 2AB2 + heat A2 + 4B A2 + 4B 2AB + heat 2A + B4 4A2B + heat

If an adult dog has 78 chromosomes, the number of chromosomes in a dog's sperm cell will be.

What is the biggest difference between an exothermic and endothermic process? A. The direction of energy flow. B. The amount of energy transferred. C. The type of energy being transferred. D. The speed with which energy is transferred.

The mass of 1 mol of chromium (atomic mass 51.996 amu) is

Which of the following elements will tend to form a cation? A. Oxygen B. Nitrogen C. Sulfur D. Lead E. All of the Above

Is pure orange juice a solution or a suspension

If a catalyst is used in a reaction: a. the energy of activation increases. b. the reaction rate does not change. c. the reaction rate increases. d. the equilibrium shifts.