
Empirical Formulas and Calculations

Interactive Video
•
Chemistry, Science, Mathematics
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary characteristic of an empirical formula?
It represents the simplest whole number ratio of atoms.
It includes the structural arrangement of atoms.
It shows the exact number of atoms in a molecule.
It is always the same as the molecular formula.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about molecular formulas?
They are always identical to empirical formulas.
They can be multiples of empirical formulas.
They are always simpler than empirical formulas.
They are used to calculate percent composition.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in calculating an empirical formula from percent composition?
Convert grams to moles.
Find the molar mass of each element.
Convert percent to grams.
Identify the smallest mole value.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you convert grams to moles in the context of empirical formula calculation?
By using the molar mass from the periodic table.
By dividing by the number of atoms.
By using the atomic number.
By multiplying by Avogadro's number.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example with sodium, sulfur, and oxygen, what is the empirical formula derived?
NaSO4
Na2SO4
NaSO3
Na2SO3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of identifying the smallest mole value in empirical formula calculations?
It is necessary for calculating percent composition.
It is used to find the simplest ratio of elements.
It helps in determining the molecular weight.
It determines the structural formula.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important not to round in the tenths place during empirical formula calculations?
It can lead to incorrect ratios.
It changes the percent composition.
It alters the atomic mass.
It affects the molecular formula.
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