Some Basic Concepts Of Chemistry Question 174
Question: The mass of a molecule of water is [Bihar CEE 1995]
Options:
A) $ 3\times {10^{-26}} $ kg
B) $ 3\times {10^{-25}} $ kg
C) $ 1.5\times {10^{-26}} $ kg
D) $ 2.5\times {10^{-26}} $ kg
Show Answer
Answer:
Correct Answer: A
Solution:
$ 6\times 10^{23} $ molecules has mass $ =18gm $
1 molecules has mass $ =\frac{18}{6\times 10^{23}} $ $ =3\times {10^{-23}}gm $
$ =3\times {10^{-26}}kg $ .
