Question

How many moles of urea is present in 250 ml of 0.2 M solution of it?

• A. 0.03
• B. 0.04
• C. 0.05
• D. 0.06

Hint:

A common mistake in molarity calculations is forgetting to convert the volume to liters. Always ensure your units are consistent before multiplying. Molarity is always in moles per liter.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
0.2M urea, 250ml. Find moles.

Step 2: Key Formula (Alternate):
Moles = Molarity × Volume(L).

Step 3: Detailed Explanation:
V=250/1000=0.25L. Moles=0.2×0.25=0.05.

Step 4: Final Answer:
0.05 moles of urea.