What kind of evidence can you use to determine if a chemical reaction has occured?

Water contracts as it freezes at 0°C. Solid ice is less dense than liquid water. Liquid water expands with increasing temperature between 0°C and 4°C. Liquid water expands with increasing temperature above 4°C.

What does alternative energy mean?

Changes in activation energy during a chemical reaction are represented by a

A computer program that shows all possible planetary orbits

Solve for x in the following expression: 3 / x = 7 A) 2.33 B) 21 C) 4 D) 0.4285

Will zinc and sodium carbonate react?

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Give 3-5 pieces of evidence to support why cloning is bad.

Nitrogen combines with oxygen to form nitrogen monoxide (no) and nitrogen dioxide (no2). a sample of no consists of 1.14 g of oxygen and 1 g of nitrogen.