Which of the following statements is true?

Evaporation is the main way water enters the atmosphere.

Condensation is the opposite of evaporation.

The total amount of water on the earth stays the same.

all of the above

What will be the charge of an atom containing eight protons, nine neutrons, and 10 electrons?

What is the molality of a solution made by dissolving 50.00 g of glucose, C6H12O6, in 500.0 g water. Give your answer to 3 significant figures.

What does the letter R symbolize in a structural formula, such as RCOOH?

What would you expect from an endothermic reaction? A. The energy levels will depend on the reaction. B. The reactants and products will have the same energy C. The reactants will have more energy than the products. D.

How many protons are present in an atom which has an atomic number of 36? Answer in units of protons.

why are plasmas of great interest to scientists or manufacturers. descride 2 current uses of plasmas and describe 1 way scientists and engineers hope to use plasmas in the future

All of the following are properties of bases except A. Bitter taste B. Produces hydroxide ions in water C. Produces hydronium ions in water D. Slippery to the touch

Sound travels through a medium. Does sound travel in space? Explain why or why not:

Which issue poses the greatest long-term challenge in the development of new nuclear power plants? [A] controlling carbon dioxide emissions [B] storage of radioactive waste [C] controlling fission reactions [D] mining of uranium

In which species does nitrogen have the highest oxidation number? Select one: a. NH3 b. N2 c. NaNO3 d. NO2- e. HNO2