Concept explainers
(a)
Interpretation:
The species with more number of atoms from 12 g H or 12 g C needs to be determined.
Concept Introduction :
Gram
(a)
Answer to Problem 6E
12 g H contains more atoms as compared to 12 g C.
Explanation of Solution
Number of gram atom of H in 12 g is 12. So number of atoms in 12 g H is
Number of gram atom of C in 12 g is 1. So number of atoms in 12 g C is
So, 12 g H contains more atoms as compared to 12 g C.
(b)
Interpretation:
The species with more number of atoms from 27 g Al or 27 g Fe needs to be determined.
Concept Introduction :
Gram atomic mass of an element contains Avogadro number (NA) of atoms which is
(b)
Answer to Problem 6E
27 g Al contains more atoms as compared to 27 g Fe.
Explanation of Solution
Number of gram atom of Al in 27 g is 1. So number of atoms in 27 g Al is
Number of gram atom of Fe in 27 g is
So 27 g Al contains more atoms as compared to 27 g Fe.
(c)
Interpretation:
Whether 40 g Ca or 40 g Na has more atoms needs to be determined.
Concept Introduction :
Gram atomic mass of an element contains Avogadro number (NA) of atoms which is
(c)
Answer to Problem 6E
40 g Na contains more atoms as compared to 40 g Ca.
Explanation of Solution
Number of gram atom of Na in 40 g is 40/23=1.74. So number of atoms in 40 g Na is
Number of gram atom of Ca in 40 g is 1. So number of atoms in 40 g Ca is
So, 40 g Na contains more atoms as compared to 40 g Ca.
(d)
Interpretation:
Whether 40 g Ca or 60 g Zn contain more atoms needs to be determined.
Concept Introduction :
Gram atomic mass of an element contains Avogadro number (NA) of atoms which is
(d)
Answer to Problem 6E
40 g Ca contains more atoms as compared to 60 g Zn.
Explanation of Solution
Number of gm atom of Zn in 60 g is
Number of gram atom of Ca in 40 g is 1. So number of atoms in 40 g Ca is
So, 40 g Ca contains more atoms as compared to 60 g Zn.
(e)
Interpretation:
Whether 10 g Li or 100 g Pb contains more number of atoms needs to be determined.
Concept Introduction :
Gram atomic mass of an element contains Avogadro number (NA) of atoms which is
(e)
Answer to Problem 6E
10 g Li contains more atoms as compared to 100 g Pb.
Explanation of Solution
Number of gram atom of Li in 10 g is
Number of gram atom of Pb in 100 g is
So, 10 g Li contains more atoms as compared to 100 g Pb.
Chapter U4 Solutions
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