A substance that can be separated into two or more substances only by a chemical change is

The wheels of a car are able to spin due to the combustion of gasoline inside the car's engine. what type of energy transfer best explains this process? a. mechanical energy is converted to light energy. b.

Why does chlorine react vigorously with hydrogen in the presence of sunlight?

Why should you not connect a 6v battery into a circuit that requires a D cell?

Provide a brief theory which explains the application of polymerization reactions to everyday life.

Which is the most accurate description of molecules? A. They are not pure substances. B. They are linked together by shared electrons. C. They are linked together by transferred electrons. D. They are made up of 1 or more atoms of 1 or more elements.

Using the periodic table, which of the following can be predicted for an atom of chlorine? It has 35.45 protons It has 17 protons It has 35.45 neutrons It has 17 neutrons

Which of these represents a chemical change?

A chemist measures the amount of iodine solid produced during an experiment. she finds that 1.6 g of iodine solid is produced. calculate the number of moles of iodine solid produced.

Write the equilibrium constant: Pb3 (PO4) 2 (s) = 3Pb2 + (aq) + 2PO2 (aq)

How many orbitals are there in the shell with n = 4?