What happens to water when it freezes?

Its mass increases.

Its mass decreases.

Its density increases.

Its density decreases.

Who came up with the atomic theory?

The formula of water, H2O suggests which of the following? A. there are two hydrogen atoms and one oxygen atom per water molecule. B. there are two oxygen atoms and one hydrogen atom per water molecule. C.

What happens to a redox reaction when it is shown as half-reactions answers?

did the data support Martha's hypothesis? Use evidence to explain why or why not. if you feel the data were inconclusive, explain why.

Beryllium Plus flourine

What are the properties of metal, nonmetal, and mellaloids

The big bang is through to have started by an?

What is the word equation for KNO3 = KNO2 + O2

Which of the following is true of mixtures? A) a mixture is a combination of two or more substances in which each substance retains its own properties B) A mixture is composed of a single pure substance C) A mixture must contain multiple compounds

Identify the main source of energy used by most organisms