Which statement is true about the particles of a solid when the solid

changes into a liquid?

1) They stop vibrating.

2) Their kinetic energy increases.

3) They move closer to each other.

4) The attractive force between them increases.

If a solution has a pH of 10, is the solution acidic or basic? Explain why

Which of the following is the strongest acid? HCl, H2S, Cl2, H2O

Given the equation: this equation represents the formation of a (1) fluoride ion, which is smaller in radius than a fluorine atom (2) fluoride ion, which is larger in radius than a fluorine atom (3) fluorine atom, which is smaller in radius than a

Jimmy mixes 2 chemicals in the lab. The chemicals change color and they get hot. The rise in temperature shows this reaction is:

Instruction Active Identifying Direction of Heat Flow Scenario Object 1 Object 2 Indicate the direction of heat flow in each scenario.

With the exception of a species that lives near the Florida coast, sea urchins are basically harmless to people. Which word is an adjective?

Will some one add me as a friend

1 mol of an Ideal Gas expands through a turbine adiabatically to produce work. Assuming steady flow conditions, how much work is lost due to the entropy generated, if the surroundings are at 300 K? Give the value of lost work to the nearest J.

According to Table N, which radioactive isotope is best for determiningthe actual age of Earth? (1) 238 U (3) 60 Co (2) 90 Sr (4) 14 C

If 10 moles of H2O are produced how many moles of CO2 are also produced.