Conservation of Matter and Chemical Reactions: Quiz

The law of conservation of mass says substances can neither be _______ nor ___________.

• Built; torn down

• Blended together; separated

• Created; destroyed

• Condensed; extracted

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Matter states that the total amount of matter _____ after it undergoes change.

• disappears

• stays the same

• weighs less

• explodes

Tags

NGSS.MS-PS1-5

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called?

2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products

• Yields

• Chemical Equation

There are 4 hydrogens in the products of the equation. How many hydrogens would you expect in the reactants?

• 1

• 3

• 4

• 5

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 80 g of product
• a total of 20g of product

Tags

NGSS.MS-PS1-5

• 2

• 3

• 4

• 8

Tags

NGSS.MS-PS1-1

What is a closed system?

• a system where none of the reactants or products are allowed to escape
• compounds made of thousands of repeating smaller molecules
• a system where all of the reactants or products are allowed to escape

• occurs when the atoms and molecules of two or more substances rearrange to form new substances

Tags

NGSS.MS-PS1-5

Two liquids are mixed in a chemical reaction forming a white solid. What will the mass of the new solid substance be?

• 150 g

• 100 g

• 250 g

• 50 g

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Several students made a claim about what happened when the coal was burned. Which claim is support with evidence form the image below?

• All of the particles in the solid piece of coal have rearranged into a colorless gas.

• The solid coal particles get burned up and destroyed when coal is burned.

• The gas particles created have less mass than the solid coal particles.

• The solid coal is converted into pure energy when burned.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-4