Chemical Reactions assessment

Front

What does the number 3 represent in 4NH₃?

Back

Subscript

Front

In a chemical reaction, what is true about the total mass of the products and reactants?

Back

In a chemical reaction, the total mass of the products is equal to the total mass of the reactants.

Front

How many total atoms are in the compound 2C₂H₆?

Back

16

Front

Which of the following is NOT an example of a chemical reaction? Wood Burning, A cake baking in an oven, Melting Ice Cream, Mixing Vinegar and Baking Soda

Back

Melting Ice Cream

Front

Which of the following is an example of a chemical process? Cutting a pizza into small slices, Sodium metal disappearing when placed in water and hydrogen gas is created, Dissolving sugar in a glass of water, Painting a house a different color.

Back

Sodium metal disappearing when placed in water and hydrogen gas is created.

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into different substances (products) with different properties.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it remains constant.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules are involved.