NGSS.MS-PS1-5

The law of conservation of mass states...

• Mass can be created and destroyed
• Mass can not be created nor destroyed
• something contains mass
• Nothing can be desttroyed

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NGSS.MS-PS1-5

Fill in the blanks with coefficient:
PCl₅+_ H₂O→_ HCl+H₃PO₄

• 4, 5
• 1, 6
• 3, 8
• 2,2

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NGSS.MS-PS1-5

Law of Conservation of Mass says that matter CAN be created and CAN be destroyed.

• True
• False

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NGSS.MS-PS1-5

Identify if the following equation is unbalanced or balanced.

O₃+2C→3OC

• Unbalanced

• Balanced

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NGSS.MS-PS1-5

Can mass be created or lost in a chemical change?

• Yes

• No

• Sometimes

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NGSS.MS-PS1-5

The law of conservation of mass tells us that matter

• cannot be created or destroyed

• can be created and destroyed

• Can be destroyed

• Can be created

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NGSS.MS-PS1-5

Why does this picture demonstrate the Law of Conservation of Mass?

• the number of atoms of each element are the same on both sides

• they start out separate and end up combined

• the same elements are used

• it doesn't demonstrate the Law of Conservation of Mass

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NGSS.MS-PS1-5

Determined whether the following equation is balanced or unbalanced. Ag + O_{2 --->} 2Ag₂O

• Balanced

• Unbalanced

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NGSS.MS-PS1-5

Which of the following is defined as, "an ending substance that is made during a chemical reaction"?

• product

• reactant

• molecules

• atoms

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NGSS.MS-PS1-5

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4

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NGSS.MS-PS1-5