Writing Equations

The red numbers in the image below represent ________

• subscripts

• coefficients

• I don't know, and don't want to try

• None of the answers are correct

The blue numbers in the image below represent ________

• I don't know, and don't want to try

• coefficients

• subscripts

• none of the answers are correct

The substances at the beginning of a chemical equation are called the ____

• product

• yield

• chemical symbol

• reactants

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

This appears on the left side of a chemical formula, and represents how many molecules there are. 

• A Molecule

• The Coefficient

This appears on the left side of a chemical formula, and represents how many molecules there are. 

• An Atom

• The Subscript

• A Molecule

• The Coefficient

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

• charge

• subscript

• random number

• coefficient

Balance this equation:
 2Li + Cl₂ -> LiCl

• 2Li + Cl₂ -> 4LiCl2

• 2Li + Cl₂ -> LiCl₂

• 2Li + Cl₂ -> 2LiCl

Tags

NGSS.MS-PS1-5

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the following equation balanced or unbalanced ? 
Al + O₂ --> Al₂O₃

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1

• 1,1,1,2

• 1,2,1,1

• 2,1,1,1

Tags

NGSS.MS-PS1-5