Chemical Formulas

Flashcard
•
Science
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical formula?
Back
A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the quantity of each element.
Tags
NGSS.MS-PS1-1
2.
FLASHCARD QUESTION
Front
How do you determine the number of atoms in a chemical formula?
Back
Count the subscripts in the formula. If there is no subscript, it is understood to be 1.
Tags
NGSS.MS-PS1-1
3.
FLASHCARD QUESTION
Front
What does the subscript in a chemical formula represent?
Back
The subscript indicates the number of atoms of the element that are present in one molecule of the compound.
Tags
NGSS.MS-PS1-1
4.
FLASHCARD QUESTION
Front
In the formula CH₃CH₂Br, how many hydrogen atoms are there?
Back
There are 5 hydrogen atoms.
Tags
NGSS.MS-PS1-1
5.
FLASHCARD QUESTION
Front
What is the chemical formula for sulfuric acid?
Back
The chemical formula for sulfuric acid is H₂SO₄.
6.
FLASHCARD QUESTION
Front
How many atoms of sulfur are in H₂SO₄?
Back
There is 1 atom of sulfur in H₂SO₄.
Tags
NGSS.MS-PS1-1
7.
FLASHCARD QUESTION
Front
What is the total number of atoms in the amino acid alanine (C₃H₇NO₂)?
Back
There are 13 atoms in each molecule of alanine.
Tags
NGSS.MS-PS1-1
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