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Chemical Reaction Review

Authored by Teresa Schittone

Chemistry

9th - 12th Grade

NGSS covered

Chemical Reaction Review
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23 questions

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1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Is this equation balanced or unbalanced? 
H2 + O2 --> H2O

balanced
unbalanced

Tags

NGSS.MS-PS1-5

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

How many nitrogen atoms does NH3 have?

1
2
3
4

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

How many oxygen atoms are in this chemical formula?

6 oxygen atoms
2 oxygen atoms
3 oxygen atoms
4 oxygen atoms

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Suppose a reaction were to happen in an open container in a lab.  During the reaction, the scientist observes the chemicals bubble, and produce a gas.   During the analysis the scientist notices that the reactants weighed 20 g when he started, and the product weighed 18 g.  Explain what happened.  

His chemical reaction defied the law of conservation of mass
The product destroyed mass during the reaction
The reactants created matter during the reaction
The gas that was produced was not able to be weighed since the container was open.  

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 Mg  +  ___ HCl  →   MgCl2  +   H2

1
2
3
4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Balance this equation-
__P+ __O--> __P2O3

it is already balanced
2, 1, 3
1, 2, 3
1, 3, 2

Tags

NGSS.MS-PS1-5

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