What is the process for determining the molecular formula from the empirical formula?

Molecular Formula

Quiz
•
Chemistry
•
12th Grade
•
Medium
muhammad sameer
Used 7+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Using the color of the compound to determine the molecular formula
Dividing the molar mass of the empirical formula by 2
Counting the number of atoms in the empirical formula
Comparing the molar mass of the empirical formula to the molar mass of the actual compound
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the empirical formula of a compound is CH2O and its molar mass is 90 g/mol, what is its molecular formula?
C4H8O4
CH4O2
C2H4O2
C3H6O3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the empirical formula of a compound is C2H5 and its molar mass is 58 g/mol, what is its molecular formula?
C5H12
C4H10
C2H6
C3H8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain the relationship between empirical formula and molecular formula.
The empirical formula shows the simplest whole number ratio of the elements, while the molecular formula shows the actual number of each element in a molecule.
The empirical formula is always the same as the molecular formula
The empirical formula is used for organic compounds, while the molecular formula is used for inorganic compounds
The molecular formula is used for ionic compounds, while the empirical formula is used for covalent compounds
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the empirical formula of a compound is NH2 and its molar mass is 32 g/mol, what is its molecular formula?
N2H4
NH4
N2H2
NH3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What information is needed to determine the molecular formula from the empirical formula?
The molar mass of the compound
The boiling point of the compound
The color of the compound
The state of matter of the compound
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the empirical formula of a compound is C3H6O and its molar mass is 102 g/mol, what is its molecular formula?
C4H8O
C3H6O
C5H10O
C6H12O2
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