Empirical and Molecular Formula
Authored by Megan Beckwith
Science
10th - 12th Grade
Used 2+ times
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13 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the percent by mass of oxygen in MgO?
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the percent by mass of fluorine in CaF2 (gram-formula mass = 78 g/mol)?
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the percent composition by mass of oxygen in the compound MgSO4 (gram formula mass = 120 g/mol)?
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which pair has the same empirical formula?
5.
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?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A formula with the lowest whole # ratio of elements in a compound is called
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