Empirical Formulas and Composition Quiz
Authored by Joseph Dimino
Chemistry
12th Grade
NGSS covered
Used 1+ times
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29 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the definition of an empirical formula in chemistry?
The formula showing the actual number of atoms of each element in a molecule
The formula showing the simplest whole-number ratio of atoms in a compound
The formula showing the arrangement of atoms in a molecule
The formula showing the mass of each element in a compound
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
11.19%
33.33%
88.81%
5.05%
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements best describes the difference between an empirical formula and a molecular formula?
Empirical formulas show the actual number of atoms; molecular formulas show the simplest ratio.
Empirical formulas and molecular formulas are always the same.
Empirical formulas show the simplest ratio; molecular formulas show the actual number of atoms.
Empirical formulas show the arrangement of atoms; molecular formulas do not.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following is the correct empirical formula for a compound containing 40% sulfur and 60% oxygen by mass?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
If a compound contains 27.3% carbon and 72.7% oxygen by mass, what is its empirical formula? (Atomic masses: C = 12, O = 16)
Tags
NGSS.HS-PS1-1
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