Unit 6: Chemical Reactions Test REVIEW

How many atoms of carbon (C) are in  C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1

Element or compound?
H₂O

• element
• compound

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6Na₂SO₄?

• 1

• 12

• 6

What is the Law of Conservation of Mass?

• It states that no matter can be created or destroyed.
• It states that no energy can be created or destroyed.
• It states that matter can be created or destroyed.
• It states that no sound can be created or destroyed.

Tags

NGSS.MS-PS1-2

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

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Tags

NGSS.MS-PS1-5

Why must chemical equations be balanced?

• So that the equation doesn't explode

• The reaction won't happen until it is balanced

• Based on the Law of Conservation of Matter, matter cannot be created or destroyed.

• Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e

Tags

NGSS.MS-PS1-5

Which are the reactants in the following reaction?

2Mg + O₂ ---> 2MgO

• Mg and O₂

• MgO

• Mg and MgO

• O₂ and MgO

Tags

NGSS.MS-PS1-2

How many oxygens are in Al₂(SO₄)₃?

• 4
• 12
• 7
• 24

Tags

NGSS.MS-PS1-1

 $C_2H_6\ +\ 5O_2\ \rightarrow\ 2CO_2\ +\ 3H_2O_2$  
Given this chemical equation, what are the PRODUCTS?

•  $C_2H_{6\ }and\ 5O_2$  

•  $2CO_2\ and\ 3H_2O_2$  

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5