Multiple Choice
How many oxygen atoms are present in one formula unit of Al_2(SO_4)_3?
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Empirical Formula
Multiple Choice
Which of the following pairs of compounds have the same empirical formula?
A
C2H4 and C3H6
B
C2H2 and C4H10
C
C3H8 and C4H8
D
C2H6 and C3H8
0 Comments
Verified step by step guidance1
Recall that the empirical formula represents the simplest whole-number ratio of atoms of each element in a compound.
For each compound, determine the ratio of carbon (C) atoms to hydrogen (H) atoms and simplify it to the smallest whole numbers.
For example, for C2H4, divide both subscripts by 2 to get the empirical formula CH2.
Do the same for C3H6: divide both subscripts by 3 to get CH2, which matches the empirical formula of C2H4.
Compare the simplified ratios for the other pairs to see if their empirical formulas match or differ.
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