
Chemical Formulas and Equations
Authored by Stephen Edwards
Chemistry
8th Grade
NGSS covered
Used 96+ times

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36 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
This appears on the left side of a chemical formula, and represents how many molecules there are.
Tags
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
How many hydrogen atoms are in this chemical formula?
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
How many oxygen atoms are in this chemical formula?
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
How many oxygen atoms are in this chemical formula?
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Is this balanced?
2HgO → 2Hg + O2
Yes
No, Hg is not balanced.
No, O is not balanced.
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Is this balanced?
2Al + O2 → Al2O3
Yes
No, O is not balanced.
No, Al is not balanced.
Tags
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Law of conservation of matter states that ____.
Tags
NGSS.MS-PS1-5
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