PS8.1.3/PS8.1.5 Review

Quiz
•
Science
•
8th Grade
•
Medium
+1
Standards-aligned
Destenee ApexFriendshipMS
Used 1+ times
FREE Resource
30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In the chemical formula H₂O, what does the subscript "2" indicate?
a) There are 2 oxygen atoms.
b) There are 2 hydrogen atoms.
c) There are 2 water molecules.
d) There are 2 water atoms.
Tags
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following is the correct way to balance the equation below?
H₂ + O₂ → H₂O
a) H₂ + O₂ → H₂O
b) 2H₂ + O₂ → 2H₂O
c) 2H₂ + 2O₂ → H₂O
d) H₂ + 2O₂ → 2H₂O
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
How many oxygen (O) atoms are there in the compound CaCO₃?
a) 1
b) 2
c) 3
d) 4
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the total number of atoms in the molecule C₂H₆?
a) 2
b) 6
c) 8
d) 12
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following equations is balanced?
a) C + O₂ → CO
b) 2Na + Cl₂ → 2NaCl
c) CH₄ + O₂ → CO₂ + 2H₂O
d) H₂ + O₂ → H₂O
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In a chemical reaction, what does a coefficient in front of a molecule indicate?
a) How many atoms are in the molecule
b) How many molecules are present
c) The number of subscripts
d) The number of bonds in the molecule
Tags
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The law of conservation of mass states that:
a) Mass can be created and destroyed in chemical reactions.
b) The total mass before and after a chemical reaction remains the same.
c) Atoms are destroyed during a chemical reaction.
d) Mass is transferred between reactants and products.
Tags
NGSS.MS-PS1-5
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