Multiple Choice
The diagram shows the molecular structure of propane. What is the chemical formula for propane?
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3. Chemical Reactions
Molecular Formula
Multiple Choice
Which of the following is the correct molecular formula for propane?
A
C4H10
B
C2H6
C
C3H8
D
CH4
Verified step by step guidance1
Understand that the molecular formula represents the actual number of atoms of each element in a molecule.
Recall that propane is an alkane, which follows the general formula for alkanes: \(C_nH_{2n+2}\), where \(n\) is the number of carbon atoms.
Identify the number of carbon atoms in propane, which is 3, so substitute \(n=3\) into the formula: \(C_3H_{2(3)+2} = C_3H_8\).
Compare the given options to the formula \(C_3H_8\) to find the correct molecular formula for propane.
Confirm that \(C_3H_8\) matches the correct molecular formula for propane, distinguishing it from other options like \(C_4H_{10}\) (butane), \(C_2H_6\) (ethane), and \(CH_4\) (methane).
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