The law which says that matter is neither produced nor destroyed in a physical or chemical reaction is the law of

These reactions can also be reversed, breaking the large molecules into its individual molecules. what substance would need to be added in order to reverse the reaction

Rutherford's experimental observations, which of the following statements describes the structure of the atom according to Rutherford's atomic model?

Which of the following is a base? Baking soda in water, pH 11 Milk, pH 7.1 Tomato juice, pH 4.1

Which of the following is an example of how a scientist might use a model A. Marbles placed inside a hollow sphere are used to describe protons in a nucleus B. Stopwatches measure the amount of time it takes for runners to complete a mile C.

If an atom has a neutral charge what does that tell you A. the atomic mass of an atom B. the number of neutrons of the atom C. the number of electrons in the atom D. the most common isotopes of am atom

Read the excerpt from a science text. In our experiment, we filled two identical glasses with water. To one glass, we added two tablespoons of salt and stirred. To the other glass, we added four drops of food coloring and stirred.

Carbon can double bond to some atoms to complete its octet. True or false?

What is caused by the heating and coolingof the earth

How do the particlesthat make up an atom interact

A chemistry student needs 55.0g of dimethyl sulfoxide for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of dimethyl sulfoxide is ·1.10gcm-3.