Answer :
(a) The number of amu is 1.008 amu.
(b) The mass of one lithium atom is [tex]11.5\times 10^{-24}g[/tex]
(c) The number of amu is 39.09 amu.
Explanation :
As we are given that conversion factor:
[tex]1amu=1.66054\times 10^{-24}g[/tex]
(a) To calculate the number of amu.
As, [tex]1.66054\times 10^{-24}g[/tex] of neutrons = 1 amu
So, [tex]1.674\times 10^{-24}g[/tex] of neutrons = [tex]\frac{1.674\times 10^{-24}g}{1.66054\times 10^{-24}g}\times 1amu=1.008amu[/tex]
Thus, the number of amu is 1.008 amu.
(b) To calculate the mass of one lithium atom.
As, 1 amu of lithium atom = [tex]1.66054\times 10^{-24}g[/tex]
So, 6.94 amu of lithium atom = [tex]6.94\times 1.66054\times 10^{-24}g=11.5\times 10^{-24}g[/tex]
Thus, the mass of one lithium atom is [tex]11.5\times 10^{-24}g[/tex]
(c) To calculate the number of amu.
As, [tex]1.66054\times 10^{-24}g[/tex] of neutrons = 1 amu
So, [tex]6.492\times 10^{-23}g[/tex] of neutrons = [tex]\frac{6.492\times 10^{-23}g}{1.66054\times 10^{-24}g}\times 1amu=39.09amu[/tex]
Thus, the number of amu is 39.09 amu.
