Chemical Reactions

Chemical formulas represent ____.

• chemical equations

• reactants

• products

• compounds

The substances formed during a chemical reaction are ___.

• reactants

• products

• compounds

• chemical formulas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The substances present at the beginning of the chemical reaction are ___.

• reactants

• products

• compounds

• chemical formulas

Tags

NGSS.HS-PS1-7

Bonds break, atoms rearrange, new bonds and new substances are formed during ___.

• chemical formulas

• chemical reactions

• chemical equations

• chemical symbols

Is a description of a reaction using element's symbols and chemical formulas.

• chemical formulas

• chemical reactions

• chemical equations

• chemical symbols

Tags

NGSS.HS-PS1-7

States that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after a chemical reaction

• Law of chemical reactions

• Law of conservation of energy

• Law of conservation of momentum

• Law of conservation of mass

Tags

NGSS.HS-PS1-7

The mass of the reactants is ____ the mass of the products.

• always greater than

• always smaller than

• always equal to

• ignored to

Tags

NGSS.HS-PS1-7

The chemical equation shown is ___.

• incomplete

• balanced

• unbalanced

• incorrect

Tags

NGSS.HS-PS1-7

The chemical equation shown is ___.

• incomplete

• balanced

• unbalanced

• incorrect

Tags

NGSS.HS-PS1-7

The coefficients that balance the chemical equation shown are ___.

• 1,2,2

• 2,1,2

• 2,2,1

• 1,1,1