Atomic Structure Question 155
Question: The mass of a mol of proton and electron is
Options:
A) $ 6.023\times 10^{23}g $
B) $ 1.008g $ and $ 0.55mg $
C) $ 9.1\times {10^{-28}}kg $
D) $ 2gm $
Show Answer
Answer:
Correct Answer: B
Solution:
Mass of a proton $ =1.673\times {10^{-24}}g $ \
Mass of one mole of proton $ =9.1\times {10^{-24}}\times 6.02\times 10^{23} $
$ =10.07\times {10^{-1}}=1.008,g $
Mass of a electron $ =9.1\times {10^{-28}}g $ \
Mass of one mole of electron $ =9.1\times {10^{-28}}\times 6.02\times 10^{23} $
$ =54.78\times {10^{-5}}g=0.55,mg $ .
