Chemical Equations Practice

Which drawing below represents this chemical formula?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Which drawing below represents this chemical formula?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

When copper reacts with oxygen gas in the air, it turns into copper oxide. What is/are the reactant(s) in this reaction?

• Copper

• Oxygen Gas

• Copper Oxide

• Copper AND Oxygen Gas

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Aluminum oxide can be broken down into aluminum and oxygen gas. When this reaction takes place, what is/are the reactant(s)?

• Aluminum oxide

• Aluminum

• Oxygen Gas

• Aluminum AND Oxygen Gas

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

4 molecules of Hydrogen Gas (H₂) react with 2 molecules of Oxygen Gas (O₂) to make some Water (H₂O). How many molecules of water will this reaction make?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which equation below is balanced?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of the following statements is TRUE about the equation below?

• The equation IS balanced because there are 2 atoms of Nitrogen and 5 atoms of Hydrogen on each side of the equation.

• The equation is NOT balanced because there are 6 atoms of Hydrogen in the reactants, but only 3 atoms of Hydrogen in the products.

• The equation IS balanced because there are 2 atoms of Nitrogen and 6 atoms of Hydrogen on each side of the equation.

• The equation is NOT balanced because there are 5 atoms of Hydrogen in the reactants, but only 3 atoms of Hydrogen in the products.

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In chemical reactions, what does the law of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.
  

Tags

NGSS.MS-PS1-5

6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂

What are the products(s) in this equation?

• CO₂ and H₂O

• C₆H₁₂O₆ and O₂

• H₂O and C₆H₁₂O₆

• CO₂ and O₂

Tags

NGSS.MS-LS1-6

Zn + 2 HCl → H₂ + ZnCl₂

If you have 5 atoms of Zn, and 10 molecules of HCl in the reactants, how many atoms of Zn will you have in the products?

• 5

• 10

• 15

• 50

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2