Question

What is the molecular formula of 3-bromopropene?

• A. \(\text{C}_3\text{H}_6\text{Br}\)
• B. \(\text{C}_3\text{H}_7\text{Br}\)
• C. \(\text{C}_3\text{H}_5\text{Br}\)
• D. \(\text{C}_3\text{H}_3\text{Br}\)

Hint:

When determining the molecular formula of a compound, count the atoms of each element based on the structure provided.

Answer 1

The Correct Option is C

Step 1: Understanding the structure of 3-bromopropene.
3-bromopropene is an alkene with a bromine atom attached to the third carbon of a three-carbon chain. The molecular formula includes 3 carbon atoms, 5 hydrogen atoms, and 1 bromine atom.
Step 2: Analyzing the options.
(A) \(\text{C}_3\text{H}_6\text{Br}\): Incorrect, this formula would suggest an extra hydrogen atom.
(B) \(\text{C}_3\text{H}_7\text{Br}\): Incorrect, this would correspond to a different compound.
(C) \(\text{C}_3\text{H}_5\text{Br}\): Correct — this is the molecular formula for 3-bromopropene, with the appropriate number of carbon, hydrogen, and bromine atoms.
(D) \(\text{C}_3\text{H}_3\text{Br}\): Incorrect, the hydrogen count is too low for this compound.
Step 3: Conclusion.
The correct answer is (C) \(\text{C}_3\text{H}_5\text{Br}\).