Law of Conservation of Mass

Law of Conservation of Mass

TEKS 7C-Law of Conservation of Mass

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Multiple Choice

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

• Built; torn down

• Blended together; separated

• Created; destroyed

• Condensed; extracted

Multiple Choice

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

• 4 grams

• 6 grams

• 8 grams

• 10 grams

Multiple Choice

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

Multiple Choice

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

Multiple Choice

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

Multiple Choice

12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed?

• 28 g

• 4g

• 30g

• 12g

Multiple Choice

Identify the Reactants in this equation.

• A

• B

Good job!

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