What unit is used to express the average kinetic energy of a system

When water cools from 10 °C and then freezes to become ice, which of the following best describes describe the heat flow between the system and surroundings? A) The energy of the universe is decreasing because the water is cold.

Rock B reacts with hydrochloric acid. State the name of the rock B

Which of the following concerning the effects of temperature and pressure on solubility is/are correct? 1. All gases become more soluble in a liquid at a fixed pressure when the temperature of the liquid is increased. 2.

If I added 50 grams of salt to water and evaporated the solution with a hot plate, what amount of salt would be left behind?

Describe the flow of one molecule of water through the water cycle, beginning in the ocean.

Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?

Nonrenewable resources are?

Watch the animation, then check off the samples that will conduct electricity. Check all that apply. View Available Hint (s) Check all that apply. NaCl solution Solid NaCl Solid sugar Sugar solution

Burning wood represents a chemical change. True or False?

Why are phosphates in laundry detergent