Describing Chemical Reactions

In a balanced chemical equation, _______________.

• atoms are conserved.
• molecules are equal.

Tags

NGSS.MS-PS1-5

The type of reaction in which hydrogen and oxygen are produced by running an electric current through water is an example of ________________.

• decomposition

• synthesis

A reaction that has two compounds as reactants and two compounds as products is most likely a ___________________.

• Single Replacement Reaction.
• Double Replacement Reaction

A number written in front of a chemical formula is a(n) _____________________.

• coefficient
• subscript

The principle that states that matter is neither created nor destroyed during a chemical reaction is called the law of ___________________.

• conservation of mass
• conservation of molecules

Tags

NGSS.MS-PS1-5

The production of carbon dioxide during the burning of fuel is an example of a(n) ___________________ reaction.

• synthesis
• decomposition

In the chemical equation, the arrow is read as yields.

• True
• False

The law of conservation of mass was first demonstrated by the French chemist Antoine Lavoisier.

• True
• False

Tags

NGSS.MS-PS1-5

You can balance a chemical equation by changing the subscripts.

• True
• False

Tags

NGSS.HS-PS1-7

A substance that is present after a reaction is the reactant.

• True
• False