An example of a substance that can be decomposed by a chemical change is:

A) silver

B) water

C) iron

D) helium

What is the ratio of the concentrations of H2PO4 and HPO4 2 at (a) pH 7.0; (b) pH 7.5; (c) pH 8.0?

Do you think there is a time when we will run out of fossil fuels to burn. why or why not?

What contains huge, floating rafts of algae. A. inter tidal area B. coral reef C. estuary D. Sargasso sea E. polar ice F. marsh G. swamp

The properties of carbon are expected to be most similar to those of

As the sun gets higher in the sky, your shadow gets longer.

Some elements are solids at room temperature true or false

What is the most expensive element?

Constance is making a vegetable soup that contains carrots, beans, water, salt, pepper, bits of ham, and onions. the soup has to cook for 4 hours. while the soup is cooking, what will happen to some of the minerals that are in its ingredients?

Which of the following form solid solutions? Select all that apply. naturally occurring minerals gases present in air HCl and water sugar and water metal alloys

Alan's go-kart travels 1750 feet per minute, and Barry's go-kart travels 21 miles perhour. Who's go-kart travels faster?