Writing Chemical Equations Practice

Number BELOW on an element

• product

• reactant

• subscript

• coefficient

Tags

NGSS.MS-PS1-1

one or two letters representing a chemical element.

• subscript

• coefficient

• chemical symbol

Chemical reactions occur when _________ are broken and new bonds are formed.

• mixtures

• osteoclasts

• physical bonds

• chemical bonds

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

a scientific principle that states mass cannot be created or destroyed during ordinary physical or chemical changes

mass of reactants = mass of products

• law of conservation of mass

• law of configuration

• newtons law

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A group of chemical symbols and numbers to show number of atoms of each element in a molecule

• reactant

• Chemical Formula

• product

Tags

NGSS.MS-PS1-1

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃

• 2 Fe + 3O₂ -> Fe₂O₆

• 4 Fe + O₆ -> 2Fe₂O₃

• None of the options are correctly balanced.

Tags

NGSS.MS-PS1-5

Balance this equation.
_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1

• 2,1,2,1

• 1,2,1,2

• 0,2,0,2

Tags

NGSS.MS-PS1-5

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

• 1

• 2

• 3

• 0

Tags

NGSS.MS-PS1-5

Which of the following reactions is balanced?

• 2CH₄ + O₂ -> CO₂ + H₂O

• CH₄ + 2O₂ -> CO₂ + H₂O

• CH₄ + 2O₂ -> CO₂ + 2H₂O

• None of the chemical equations are balanced.

Tags

NGSS.MS-PS1-5

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5