Law of Conservation of Matter Test 2022
Authored by Melissa Stelson
Science
7th - 12th Grade
NGSS covered
Used 3+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The reaction of element X ( the black boxes ) with element Y ( the white circles ) is represented in the following diagram: Which equation properly describes the reaction between X and Y?
3X + 8Y -> X3Y8
3X + 6Y-> X3Y6
X + 2Y -> XY2
3X + 8Y -> 3XY2 + 2Y
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does a balanced chemical equation support the Law of Conservation of Mass?
Because the total mass of the products is greater than the mass of the reactants
Because the total mass of the reactants is less than the mass of the products
Because the total mass of the reactants equals the total mass of the products
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which remains the same during a chemical reaction?
The temperature of the elements
The total number of atoms
The total number of compounds
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following equations represents the law of conservation of mass?
H2O -> H2 + O2
2H + 2O -> 2H2O
2H2O -> 2H2 + O2
H2 + O2 -> H2O + H2O2
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A chemical reaction is represented by this equation.
2Fe2O3 -> 4Fe + 3O2
What is a product of this chemical reaction?
FeO
F
O2
Fe2O3
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following equations represents the law of conservation of mass?
Na + 2Cl2 -> 2NaCl
2Na + Cl2 -> 2NaCl
4Na + 2Cl2 -> 3NaCl
2Na + 2Cl2 -> 4NaCl
Tags
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which equation is the correctly balanced chemical equation for this reaction?
HgO -> Hg + 2O2
2HgO -> Hg + O2
2HgO -> 2Hg + O2
2HgO -> Hg + 2O2
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
NGSS.MS-PS1-1
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