Chemistry Semester A Final Review

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

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.HS-PS1-7

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

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-7

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

• The total mass of the reactants is equal to the total mass of the products.

• 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.
• The reactants are the same matter as the products.

Tags

NGSS.HS-PS1-7

One reactant into several products.

• Decomposition
• Synthesis
• Combustion
• Single Replacement

What mass of carbon dioxide gas (CO2) is produced in this reaction?

• 51

• 41

• 92

• 72

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of bond forms when 2 or more electrons are SHARED between 2 nonmetals?

• Covalent bond
• Incomplete bond
• Ionic bond
• Metallic bond

What type of bond forms between two or more atoms that are oppositely charged (+/-)?

• Covalent bond

• Incomplete bond

• Ionic bond

• Metallic bond

Tags

NGSS.HS-PS1-3

Which of the following is an example of an IONIC COMPOUND?

• NaCl
• H₂O
• CO₂
• NO

Tags

NGSS.HS-PS1-2

Which of the following is an example of a COVALENT COMPOUND?

• H₂S
• KI
• CaCl₂
• MgO

Tags

NGSS.MS-PS1-1