What does homogeneous mixture of elements mean

A 62.6-gram piece of heated limestone is placed into 75.0 grams of water at 23.1°C. The limestone and the water come to a final temperature of 51.9°C. The specific heat capacity of water is 4.

Driving cars lowers the pH of the oceans by a. releasing CO2 that dissolves and forms acid in the oceans b. releasing pollutants that lead to smog C. releasing CO that dissolves and forms acid in the oceans d.

The net charge on a sulfide ion (s2-) explain how this ion obtains its charge your answer should include a discusion of subatomic particles

The electron configuration of an element is 1s22s22p4. Describe what most likely happens when two atoms of this element move toward each other.

What most likely to the inclusion of these elements in the periodic table

How do ionization energies provide evidence for the quantization of the energies of electrons?

What causes lightning? a) thunder b) an electric discharge c) rising warm air d) air masses meeting

In a problem, you are given two pressures and one temperature at constant volume and amount of gas. You are asked to find a second temperature. What law should you use?

How many cups are in a 5-lb. bag of flour?

How is oxygen separated from other substances nearby?