List 4 clues that a chemical reaction is occurring

If water is evaporated after a neutralization reaction, what remains?

The hydroxide ion concentration in pure water at 25ºC is NOT equal to A. the hydronium ion concentration. B. 1 X 10^-7 M. C. the hydroxide concentration in a solution with a pH of 7. D. 1 X 10^7 M.

A scientist observes that after mixing a solid powder into water, the pH of the newly formed solution is 2.7. What can he infer from this observation? The solution contains an indicator that has a pH of 2.7. The solid powder contained hydrogen ions.

Which of the following is a way earths water is directly affected by pollution emissions from cars toxic run off farms dumping trash on the road side production of oxygen by trees

Which statements correctly describe the process of nuclear fusion? It happens only to large atoms. It occurs naturally in the Sun. It releases a large amount of energy. It bonds atoms together to create molecules.

Use the balanced equation from number four above to determine the limiting reactant if we had a mixture of 5.0 moles of Fe and 4.0 moles of O2.

Using the kinetic theory what happens to oxygen particles as they are cooled

Identify the following: 1. The only 2 liquid elements. 2. The element in period 4, group 0. 3. The second metalloid in period 4. 4. The first element in group 4A.

You are about to open a container of soy milk but notice that there are instructions to "shake well before serving." the soy milk is most likely a

Give reason: a. Fractionating columns with beads are used for fractional distillation b. Crystallisation is a better technique than evaporation