
Counting Atoms in Chemical Formulas
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the formula for calculating the number of atoms in a chemical formula?
Back
Count the number of each type of atom present in the formula, considering subscripts and parentheses.
2.
FLASHCARD QUESTION
Front
How many total atoms are in the formula C₃H₅(NO₃)₃?
Back
17 atoms (C=3, H=5, N=3, O=9).
3.
FLASHCARD QUESTION
Front
What does a subscript in a chemical formula indicate?
Back
The number of atoms of the element in the molecule.
4.
FLASHCARD QUESTION
Front
If there is no subscript after an element symbol, how many atoms of that element are present?
Back
1 atom.
5.
FLASHCARD QUESTION
Front
How many hydrogen atoms are in the compound H₂O?
Back
2 hydrogen atoms.
6.
FLASHCARD QUESTION
Front
In the formula H₂SO₄, how many sulfur atoms are present?
Back
1 sulfur atom.
7.
FLASHCARD QUESTION
Front
What is the total number of oxygen atoms in H₂SO₄?
Back
4 oxygen atoms.
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