Multiple Choice
Which of the following molecular formulas is also an empirical formula?
70
views
3. Chemical Reactions
Empirical Formula
Multiple Choice
How many oxygen atoms are present in one formula unit of Al_2(SO_4)_3?
A
6
B
12
C
8
D
4
Verified step by step guidance1
Identify the chemical formula given: Al_2(SO_4)_3. This represents one formula unit of aluminum sulfate.
Focus on the polyatomic ion part: (SO_4)_3 means there are 3 sulfate ions, and each sulfate ion (SO_4) contains 4 oxygen atoms.
Calculate the total number of oxygen atoms by multiplying the number of sulfate ions by the number of oxygen atoms in each sulfate ion: 3 \(\times\) 4.
Perform the multiplication to find the total oxygen atoms in one formula unit: 3 \(\times\) 4 = 12 oxygen atoms.
Conclude that one formula unit of Al_2(SO_4)_3 contains 12 oxygen atoms.
Related Videos
Related Practice
