
empirical formula
Authored by Karen Carlos
Chemistry
11th Grade
Used 1+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A formula with the lowest whole # ratio of elements in a compound is called
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Given the following, determine the empirical formula: 42.07% sodium, 18.89% phosphorus, and 39.04% oxygen.
NaPO2
Na2PO3
Na3PO4
Na3PO3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
NO
N2O4
N2O3
N2O5
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
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