2.80 How many atoms of each kind are represented in the following formulas? For each, name the elements present. ( a ) CH 3 CH 2 CO 2 C 3 H 7 , ( b ) MgSO 4 ⋅ 7H 2 O, ( c ) KAl ( SO 4 ) 2 ⋅ 12H 2 O, ( d ) Cu ( NO 3 ) 2 , ( e ) ( CH 3 ) 3 COH
2.80 How many atoms of each kind are represented in the following formulas? For each, name the elements present. ( a ) CH 3 CH 2 CO 2 C 3 H 7 , ( b ) MgSO 4 ⋅ 7H 2 O, ( c ) KAl ( SO 4 ) 2 ⋅ 12H 2 O, ( d ) Cu ( NO 3 ) 2 , ( e ) ( CH 3 ) 3 COH
2.80 How many atoms of each kind are represented in the following formulas? For each, name the elements present.
(
a
)
CH
3
CH
2
CO
2
C
3
H
7
,
(
b
)
MgSO
4
⋅
7H
2
O,
(
c
)
KAl
(
SO
4
)
2
⋅
12H
2
O,
(
d
)
Cu
(
NO
3
)
2
,
(
e
)
(
CH
3
)
3
COH
7. Isotopes. (a) Argon has three naturally occurring isotopes, 36Ar, 38Ar, and 40Ar. What is the
mass number of each? How many protons, neutrons, and electrons are present in each?
(b) Gallium has two naturally occurring isotopes, 6°Ga (isotopic mass = 68.9256 amu, abundance
60.11%) and 71Ga (isotopic mass = 70.9247 amu, abundance = 39.89%). Calculate the atomic mas
of gallium.a
%3D
(c) Chlorine has two naturally occurring isotopes, 35CI (isotopic mass = 34.9689 amu) and 3"Cl
(isotopic mass = 36.9659 amu). If chlorine has an atomic mass of 35.4527 amu, what is the percent
abundance of each isotope?
The element oxygen has three naturally occurring isotopes, with 8,9, and 10 neutrons in
the nucleus, respectively. (a) write the full chemical symbols for these three isotopes. (b)
Describe the similarities and differences between the three kinds of atoms of oxygen.
An element (A) has 5 isotopes. The masses (and abundances) of the isotopes 46A, 47A, 48A, 50A are 4595263 u (7.25 %), 46.9518 u (6.44 %), 47.9479 u (63.72 %), and 49.9448 u (5.18 %) respectively. If the element Ahas an atomic mass of 47.87 u, and the last isotope 49A has a percent abundance in the ratio of 3.361 that of SA, what is the mass of 49A?
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
The Bohr Model of the atom and Atomic Emission Spectra: Atomic Structure tutorial | Crash Chemistry; Author: Crash Chemistry Academy;https://www.youtube.com/watch?v=apuWi_Fbtys;License: Standard YouTube License, CC-BY