
Empirical and Molecular Formulas

Interactive Video
•
Chemistry, Science, Biology
•
9th - 12th Grade
•
Easy

Patricia Brown
Used 1+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a molecular formula primarily used to represent in chemistry?
The number of atoms in a molecule
The number of moles of elements per mole of compound
The charge of a molecule
The weight of a molecule
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many moles of hydrogen are present in one mole of methane?
One mole
Three moles
Four moles
Two moles
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula of ethene (C2H4)?
CH2
C6H6
C2H4
CH4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following best describes an empirical formula?
The total weight of a compound
The simplest whole number ratio of moles of elements in a compound
The charge distribution in a molecule
The exact number of atoms in a molecule
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the empirical formula of benzene (C6H6)?
C6H6
C3H3
C2H2
CH
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the ratio 'n' represent in the context of molecular formulas?
The number of atoms in a molecule
The molar mass of the molecular formula divided by the molar mass of the empirical formula
The charge of a molecule
The total weight of a compound
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example problem, what is the molar mass of the empirical formula CH?
104.16 grams per mole
1.01 grams per mole
13.02 grams per mole
12.01 grams per mole
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