Which of these provides evidence that a chemical reaction occurs?

How many liters of whater must be added to 20l of a 75% acid solution toproduce a solution that is 15% acid?

Ozone decomposes to oxygen according to the equation 2o3 (g) ⟶3o2 (g).2o3 (g) ⟶3o2 (g). write the equation that relates the rate expressions for this reaction in terms of the disappearance of o3 and the formation of oxygen.

In Part 2 of the experiment, Joe first adds a buffer to his lemonade. After adding the baking soda, his lemonade is __. A. less likely to change pH B. more likely to change pH C. Neither, buffers don't affect pH

Use the drop-down menus to complete the statements. investigations allow for the control of variables and can be repeated. investigations are usually less time-consuming and less expensive.

What is usually composed of two or more minerals

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.