Counting Atoms

Flashcard
•
Chemistry
•
6th - 8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the chemical formula for sodium sulfate?
Back
Na₂SO₄
2.
FLASHCARD QUESTION
Front
How many total atoms are in the formula Al₂(SO₄)₃?
Back
23 atoms (2 Al + 3 S + 12 O)
3.
FLASHCARD QUESTION
Front
What does the subscript in a chemical formula indicate?
Back
The number of atoms of that element in the molecule.
4.
FLASHCARD QUESTION
Front
How many oxygen atoms are in the formula for sodium sulfate (Na₂SO₄)?
Back
4 oxygen atoms.
5.
FLASHCARD QUESTION
Front
What is the total number of atoms in 3Na₂B₄O₇?
Back
39 atoms.
6.
FLASHCARD QUESTION
Front
How many carbon atoms are in the formula 2Na₂CO₃?
Back
2 carbon atoms.
7.
FLASHCARD QUESTION
Front
What is the significance of parentheses in a chemical formula?
Back
They indicate that the enclosed atoms are a group that can be multiplied by the subscript outside.
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