Simple Balanced Chemical Equations

Which type of reaction takes place in the presence of oxygen and produces carbon dioxide and water?

• double replacement 

• decomposition 

• combustion 

• single replacement

Tags

NGSS.MS-PS1-5

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

Tags

NGSS.MS-PS1-5

Balance this equation: H₂ + Cl₂ ---> HCl

• It is balanced.

• H₂ + Cl₂ ---> 2HCl

• 3H₂ + Cl₂ ---> 6HCl

• H₂ + 3Cl₂ ---> 6HCl

Tags

NGSS.MS-PS1-5

Is the following equation balanced?

• YES

• NO

Tags

NGSS.MS-PS1-5

What are substances on the left side of a chemical equation known as?

• Catalysts

• Intermediates

• Products

• Reactants

When writing a chemical equation, reactants are on the _____________ while products are on the _________________.

• top, bottom

• right, left

• left, right

• bottom, top

How many Hydrogen (H) and how many Chlorine (Cl) are there?

• H = 4, Cl = 1

• H = 4, Cl = 0

• H = 4, Cl = 3

• H = 4, Cl = 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled

• the product is half the mass of the reactants

• the mass is the same

• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

Identify the Reactants in this equation.

• A

• B

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is conserved in chemical reactions?

• Density

• Volume

• Mass

• Energy

Tags

NGSS.MS-PS1-5