Chemical Formulas and Counting Atoms
8th Grade
•25 Qs
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Chemical Formulas and Counting Atoms
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
Standards-aligned
Lisa Thompson
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25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which statement is true about the following compounds?
Compound 1 contains 6 more Oxygen atoms than Compound 2
Compound 2 contains twice the amount of total atoms as Compound 3
Compound 1 contains twice the amount of total atoms as Compound 2
Compound 1 contains 30 total atoms
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many total atoms do you have for each element in this chemical formula?
P = 2, O = 4, H = 8
P = 1, O = 3, H = 2
P = 2, O = 3, H = 8
P = 2, O = 4, H = 3
Tags
NGSS.MS-PS1-1
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Which of these substances have the same number of hydrogen atoms?
H5C6PO4
C6H12O6
CH4COOH
CH3CH7
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many total atoms are in the compound for ammonia, NH3
2
3
4
5
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many hydrogen atoms are in this chemical formula:
4 hydrogen atoms
1 hydrogen atom
2 hydrogen atoms
3 hydrogen atoms
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many total atoms are in the compound 2H2O?
2
3
4
6
Tags
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
How many oxygen atoms are in this chemical formula?
6 oxygen atoms
2 oxygen atoms
3 oxygen atoms
4 oxygen atoms
Answer explanation
Remember, the coefficient tells you how many molecules there are, and the subscript tells you how many atoms there are per molecule!
Tags
formulas
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