Empirical and Molecular Formulas
Flashcard
•
Chemistry
•
10th Grade
•
Practice Problem
•
Easy
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an empirical formula?
Back
An empirical formula represents the simplest whole-number ratio of atoms of each element in a compound.
2.
FLASHCARD QUESTION
Front
What is a molecular formula?
Back
A molecular formula shows the actual number of atoms of each element in a molecule of a compound.
3.
FLASHCARD QUESTION
Front
How do you derive the empirical formula from a molecular formula?
Back
To derive the empirical formula, divide the subscripts in the molecular formula by their greatest common divisor.
4.
FLASHCARD QUESTION
Front
Given the molecular formula Si2F6, what is the empirical formula?
Back
SiF3.
5.
FLASHCARD QUESTION
Front
Which pair of compounds has the same empirical formula: NaCrO4 and Na2Cr2O7, or C2H4O2 and C6H12O6?
Back
C2H4O2 and C6H12O6.
6.
FLASHCARD QUESTION
Front
If the empirical formula is CH2O and the molar mass is 180 g/mol, what is the molecular formula?
Back
C6H12O6.
7.
FLASHCARD QUESTION
Front
What is the empirical formula of K2SO4?
Back
K2SO4.
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