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In: Physics
The element rubidium consists of two isotopes, the stable 85Rb and radioactive 87Rb (abundance 27.83%). What...
The element rubidium consists of two isotopes, the stable 85Rb and radioactive 87Rb (abundance 27.83%). What is the specific activity of natural rubidium chloride? Use Ar 85.47 gmol-1 for rubidium element, Ar 86.91 gmol-1 for 87Rb, and Mr 120.92 gmol-1 for RbCl.
Solutions
genius_generous answered 3 years agoRelated Solutions
Silver has two stable isotopes. The nucleus, 10747Ag, has atomic mass 106.905095 g/mol with an abundance...
Silver has two stable isotopes. The nucleus, 10747Ag, has atomic
mass 106.905095 g/mol with an abundance of 51.83% ; whereas
10947Ag, has atomic mass 108.904754 g/ mol with an abundance of
48.17%. What is the binding energy per nucleon for each
isotope?
1. A naturally occuring element consists of two isotopes. Calculate the percent abundances for the two...
1. A naturally occuring element consists of two isotopes.
Calculate the percent abundances for the two isotopes, if it's
average atomic mass is 107.87. Isotope 1: 106.91amu; Isotope 2:
108.90amu
2. Write the balanced chemical equation for the following
unbalanced chemical reaction: C3H8 + O2 ---> CO2 + H2O. How do I
figure this out?
3. Acceleration die to gravity of a free-falling object is 9.8
m/s2. Express this in mm/ms2. Answer is 9.8 x 10^-3, but not sure
how...
Chlorine is an unusual element in that it has two abundant stable isotopes, Cl-35 and Cl-37,...
Chlorine is an unusual element in that it has two abundant
stable isotopes, Cl-35 and Cl-37, constituting, respectively, about
76% and 24% of natural chlorine. The masses of these isotopes in
unified atomic mass units, are, to three significant figures, equal
to their mass numbers of 35 and 37. A mass spectrometer is used
with singly ionized chlorine atoms. The spectrometer has a 3.5-kV
accelerating potential and a 163-mT magnetic field. How far apart
will Cl-35 and Cl-37 ions be...
A hypothetical element consists of two isotopes of masses 70.95 amu and 72.95 amu with abundances...
A hypothetical element consists of two isotopes of masses 70.95
amu and 72.95 amu with abundances of 30.9% and 69.1%, respectively.
What is the average atomic mass of this element?
Two of the stable isotopes of mercury are 198Hg and 202Hg. These isotopes emit slightly different...
Two of the stable isotopes of mercury are 198Hg and 202Hg.
These isotopes emit slightly different wavelengths of light,
546.07532nm and 546.07355nm, respectively.
To identify which isotopes are included in a sample of mercury,
we can shine the light it emits on a diffraction grating with a
screen 6 m away. How many lines per centimeter are necessary in the
diffraction grating for the first-order bright fringes of the two
wavelengths to be 1.4 cm apart on the screen?
The element technetium (atomic number 43) is radioactive and one of its isotopes, 99Tc, is used...
The element technetium (atomic number 43) is radioactive and one
of its isotopes, 99Tc, is used in medicine for diagnostic imaging.
The isotope is usually obtained in the form of the pertechnetate
anion, TcO4-, but its use sometimes requires the technetium to be
in a lower oxidation state. Reduction can be carried out using Sn2+
in an acidic solution. The skeleton equation is TcO4- + Sn2+ → Tc4+
+ Sn4+ (acidic solution) Balance the equation by the ion–electron
method.
The element technetium (atomic number 43) is radioactive and one of its isotopes, 99Tc, is used...
The element technetium (atomic number 43) is radioactive and one
of its isotopes, 99Tc, is used in medicine for diagnostic imaging.
The isotope is usually obtained in the form of the pertechnetate
anion, TcO4-, but its use sometimes requires the technetium to be
in a lower oxidation state. Reduction can be carried out using Sn2+
in an acidic solution. The skeleton equation is TcO4- + Sn2+ → Tc4+
+ Sn4+ (acidic solution) Balance the equation by the ion–electron
method.
examine the element o, with 8 protons. how many stable isotopes does o have?
examine the element o, with 8 protons. how many stable isotopes
does o have?
1a) Why are radioactive half-lives independent of temperature? 1b) Element ‘X’ has several isotopes. How are...
1a) Why are radioactive half-lives independent of
temperature?
1b) Element ‘X’ has several isotopes. How are they different and
how are they the same? Why do you think some of them are unstable
while others may be stable?
Many radioactive isotopes are used in medicine for imaging and treatment purposes. The specific isotopes used...
Many radioactive isotopes are used in medicine for imaging and
treatment purposes. The specific isotopes used depends on the
particular organ or body system being studied (for example, Xe-133
is used to image lung function and blood flow.) For thyroid
imaging, isotopes of iodine are used, commonly I-123 and I-131,
which have half-lives of 13.2 hours and 8.0 days, respectively.
Why is iodine used for thyroid imaging (as opposed to any other
element)?
I-129 is an extremely rare isotope of...
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