The video explains the law of conservation of mass, stating that mass cannot be created or destroyed, only transformed. It covers examples of counting atoms and balancing mass in chemical equations. The video includes problems involving magnesium oxide and carbon dioxide formation, demonstrating how to calculate mass in reactions. It concludes with a suggestion for further learning resources.

What does the law of conservation of mass state?

• Mass can only be created.

• Mass can only be destroyed.

• Mass can neither be created nor destroyed.

• Mass can be created and destroyed.

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NGSS.MS-PS1-5

Which of the following is a type of word problem related to the law of conservation of mass?

• Counting protons

• Counting electrons

• Counting atoms

• Counting molecules

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NGSS.MS-PS1-5

What is another type of word problem related to the law of conservation of mass?

• Calculating the volume

• Adding and subtracting the mass

• Dividing the mass

• Multiplying the mass

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Does the following equation follow the law of conservation of mass if the reactants and products have the same number of atoms?

• Not enough information

• Maybe

• No

• Yes

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NGSS.MS-PS1-5

Why does an equation not follow the law of conservation of mass?

• The reactant side has more atoms.

• The product side does not equal the reactant side.

• The product side has more atoms.

• The reactant side does not equal the product side.

Tags

NGSS.MS-PS1-5

If magnesium and oxygen react completely, how many grams of magnesium oxide will form?

• 78.6 grams

• 36 grams

• 96 grams

• 132 grams

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NGSS.MS-PS1-5

What is the mass of magnesium oxide formed from magnesium and oxygen?

• 96 grams

• 78.6 grams

• 36 grams

• 132 grams

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NGSS.MS-PS1-5

How much oxygen will react with 36 grams of carbon to form 132 grams of carbon dioxide?

• 132 grams

• 78.6 grams

• 96 grams

• 36 grams

Tags

NGSS.MS-PS1-5

What is the mass of carbon dioxide formed from 36 grams of carbon and 96 grams of oxygen?

• 36 grams

• 96 grams

• 78.6 grams

• 132 grams

Tags

NGSS.MS-PS1-5

What is the mass of oxygen needed to react with carbon to form carbon dioxide?

• 36 grams

• 96 grams

• 78.6 grams

• 132 grams

Tags

NGSS.MS-PS1-5