Empirical/Molecular, % Comp, the mole
Flashcard
•
Chemistry
•
10th - 12th Grade
•
Practice Problem
•
Hard
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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
Which of the following is an example of an empirical formula? CH₃COOH, C₆H₁₂O₆, H₂O
Back
H₂O is the empirical formula.
3.
FLASHCARD QUESTION
Front
What is a molecular formula?
Back
A molecular formula shows the actual number and kinds of atoms present in one molecule of a compound.
4.
FLASHCARD QUESTION
Front
What are the units for molar mass?
Back
The units for molar mass are grams/mole.
5.
FLASHCARD QUESTION
Front
How do you calculate the number of moles from mass?
Back
Number of moles = mass (g) / molar mass (g/mol).
6.
FLASHCARD QUESTION
Front
How many moles are in 19.82 g of Mg?
Back
0.82 mol Mg.
7.
FLASHCARD QUESTION
Front
How many moles are in 16.94 g of water (H₂O)?
Back
0.9401 mol H₂O.
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