Chemical Reactions

What is the left part of a chemical equation called?

2H₂ + O₂ → 2H₂O

• reactants

• products

• solutions

• compounds

Tags

NGSS.HS-PS1-7

What is the right part of a chemical equation called?

2H₂ + O₂ → 2H₂O

• reactants

• products

• solutions

• compounds

What is the little number after an element in a chemical equation called?

Example: H₂

• coefficient

• atom

• subscript

• multiplier

What is the number before a chemical equation called?

Example: 2H₂ + O₂ → 2H₂O

• coefficient

• atom

• subscript

• multiplier

A chemical equation is balanced when ...

• the subscripts of the reactants equal the subscripts of the products

• the coefficients of the reactants equal the coefficients of the products

• the number of atoms in the reactants equal the number of atoms in the products

• the reactants are the same chemicals as the products

Tags

NGSS.HS-PS1-7

In order to balance a chemical equation, what are the smaller numbers that you CANNOT change the value for?

• coefficients

• subscripts

• reactants

• products

Tags

NGSS.MS-PS1-1

In order to balance a chemical equation, what are the ONLY numbers that you CAN change the value for?

• coefficients

• subscripts

• reactants

• products

Which set of coefficients correctly balance this equation?

_HgO → _Hg + _O₂

• 1:2:2

• 1:2:1

• 2:2:1

• 2:1:2

Tags

NGSS.HS-PS1-7

Which set of coefficients correctly balance this equation?

_Mg + _HCl → _MgCl₂ + _H₂

• 1:2:2:1

• 1:2:1:1

• 2:2:1:1

• 2:1:2:1

Which set of coefficients correctly balance this equation?

_H₂ + _O₂ → _H₂O

• 2:2:1

• 1:1:1

• 2:1:1

• 2:1:2

Tags

NGSS.HS-PS1-7