Atomic Structure Question 472
The mass of a mole of proton and electron is
Options:
A) $ 6.022\times 10^{23}g $
B) $ 1.008g $ and $ 0.55mg $
C) $ 9.1\times {10^{-28}}kg $
D) $ 2 g$
Show Answer
Answer:
Correct Answer: B
Solution:
Mass of a proton $ =1.673\times {10^{-24}}kg $
Mass of one mole of proton $ =1.83\times {10^{-4}}\times 6.02\times 10^{23} $
$ =10.07\times {10^{-1}}=1.007,g $
Mass of an 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 $ .
BETA
