Chemical Reactions

Front

In a chemical equation, what do the coefficients indicate?

Back

The coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made.

Front

Which of the following models best demonstrates a balanced chemical equation? Options: F, G, H, J

Back

F

Front

The reactants are on the left side of the chemical equation.

Back

True

Front

How many atoms in all are in a molecule of serotonin? C₁₀H₁₂N₂O

Back

25

Front

What is the best evidence that a chemical reaction occurs when coal burns?

Back

A new substance is produced

Front

Is burning wood a chemical or physical change?

Back

chemical

Front

Is glass breaking a chemical or physical change?

Back

physical

Front

Is hammering wood together to build a house a chemical or physical change?

Back

physical

Front

Is a a rusting bicycle a chemical or physical change?

Back

chemical

Front

Is melting butter for popcorn a chemical or physical change?

Back

physical