7.PS.1.4-Law of Conservation of Mass REVIEW for TCAP

Multiple Choice

What is the name of a single type of atom?

• cell
• proton
• element
• atom

Multiple Choice

What is the picture displayed?

• Atom
• Element
• Molecule
• Compound

Multiple Choice

What is the picture displayed?

• atom
• element
• molecule
• compound

Multiple Choice

What is the term for combining 2 or more of the SAME atoms together?

• atoms
• elements
• molecules
• compounds

Multiple Choice

What is the term for combining 2 or more DIFFERENT atoms together?

• atoms
• elements
• molecules
• compounds

Multiple Choice

What is the picture displayed?

• atom
• element
• molecule
• compound

Multiple Choice

What is the picture displayed?

• atom
• element
• molecule
• compound

Multiple Choice

Which of the following chemical formulas represents a compound? 

• C₃
• O₂
• CH₃CHO
• H₂

Multiple Choice

• element
• compound
• mixture of elements and compounds
• mixture of compounds

Multiple Choice

Which side of a chemical equation is the product side?

• Left (before the yields sign)
• Right (after the yields sign)

Multiple Choice

$$+$$  Which ones are the reactant 2HO $$+$$  Na  $$=$$  H2O2Na

• 2HO

• Na

• 2HO , Na

• H2O2Na

Multiple Choice

What are the products of the chemical reaction pictured?

• CH₄ and CO₂
• CH₄ and O₂
• CO₂ and H₂O
• O₂ and H₂O

Multiple Choice

Consider the chemical equation CH₄ + 2 O₂ → CO₂ + 2 H₂O. In this equation, CH₄ is a

• product
• reactant
• displacement

Multiple Choice

What is the left part of a chemical equation called?
H_{2 +} O → H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Multiple Choice

What is the right part of a chemical equation called?
H_{2 +} O → H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Multiple Choice

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>
• 2H₂O
• 2H₂+ O₂

Multiple Choice

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

• reactants
• products
• neutrals
• energizers

Multiple Choice

If there are 4 H atoms on the reactant side, how many H atoms will be on the product side? 

• 2
• 4
• 6
• You need more information to answer this question

Multiple Choice

How many TOTAL atoms are on the REACTANT side of this equation?

4 FeS + 7O₂ → 2 Fe₂O₃ + 4 SO₂

• 11

• 3

• 22

• 4

Multiple Choice

How many Iron (Fe) atoms are on the Product side of this equation?

3Pb(NO₃)₂ + 2FeCl₃ → 2Fe(NO₃)₃ + 3PbCl₂

• 2

• 1

• 6

• 26

Multiple Choice

How many different elements are on the Product side of this equation?

2FeCl₃ + 3MgO ---> Fe₂O₃ + 3MgCl₂

• 4

• 8

• 2

• 214

Multiple Choice

How many Lithium atoms are on the Reactant side of this equation?

6Li + 2H₃PO₄ ---> 3H₂ + 2Li₃PO₄

• 6

• 1

• 17

• 24

Multiple Choice

What elements would be on the product side of this equation if it follows the law of conservation of mass?

2ZnS + 3O₂ ---> ???

• Zn, S, O

• Zn, O, Si

• H, Li, O

• ZnSO

Multiple Choice

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

Multiple Choice

What is one possible reason that mass would be lost during a chemical reaction?

• A gas is produced and escapes into the atmosphere.

• Coach Morrissey lost it.

Multiple Choice

What is the best reason that mass could be gained after a chemical reaction?

• Elements from the environment reacted with the elements undergoing the chemical reaction.

• Coach Morrissey willed it so.

Multiple Choice

Whats the product 5NaC + H

• Na₅HC₅

• NaH

• 5NaHC

Multiple Choice

In a chemical reaction, bonds are broken and new bonds are formed that create new substances. The bonds that are broken are called what?

• Reactants
• Products
• Atoms
• Catalysts

Multiple Choice

Choose the best description below for the image

• physical change

• chemical change

Multiple Choice

Choose the best description below for the image

• physical change

• chemical change

Multiple Choice

Choose the best description below for the image

• physical change

• chemical change

Multiple Choice

Choose the best description below for the image

• physical change

• chemical change

Multiple Choice

The image is best described as

• Chemical Change

• Physical Change

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

From the image:

#26 Which part of the reaction has an elemental molecule and why?

• A

• B

• C

• D

Multiple Choice

From the image:

#27 Which action can the student perform to show that the reaction follows the Law of Conservation of Mass?

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Poll

HOW DO YOU FEEL ABOUT THE LAW OF CONSERVATION OF MASS?

• 1

  HELP!

  STILL CLUELESS

• 2

  BETTER BUT

  NEED MORE PRACTICE

• 3

  JUST ABOUT THERE!

• 4

  THIS IS EASY NOW!