Question
In: Chemistry
5. calculate the atomic mass of element "X" if it has 2 naturally occurring isotopes with...
5. calculate the atomic mass of element "X" if it has
2 naturally occurring isotopes with the following masse and natural
abundances:
X-45: 44.8776 Amu 32.88%
X-47: 46.9443 Amu 67.22%
10. silver has an atomic mass of 107.868 Amu. The Ag-109 isotope (108.905 amu) is 48.16%. what is the amu of the other isotope?
39. calculate the mass percent composition of sulfur in Al2(SO4)3.
41. determine the molecular formula for a compound that is 70.79% carbon, 8.91% hydrogen, 4.59% nitrogen, and 15.72% oxygen.
42. combustion analysis of 63.8 mg of a C, H, and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. what is the empirical formula for the compound?
Solutions
queen_honey_blossom answered 2 years agoRelated Solutions
1-which term refers to the average mass of an element's naturally occurring isotopes? 2-what is the...
1-which term refers to the average mass of an element's
naturally occurring isotopes?
2-what is the orbital notation of
manganese?
3-covalent bonds are a result of strong electrostatic
attractions between cations and anions? T or F
Only two isotopes of copper occur naturally, 63Cu (atomic mass = 62.9296 amu; abundance 69.17%) and 63Cu (atomic mass = 64.9278 amu; abundance 30.83%). Calculate the atomic weight (average atomic mass) of copper.
Only two isotopes of copper occur naturally, 63Cu (atomic mass = 62.9296 amu; abundance 69.17%) and 63Cu (atomic mass = 64.9278 amu; abundance 30.83%). Calculate the atomic weight (average atomic mass) of copper.
Element “X” has an atomic number of 16 and an atomic mass of 40 How many...
Element “X” has an atomic number of 16 and an atomic mass of 40
How many electrons are in the valence of Element X?
Osmium (Os) is the densest naturally occurring element.
Osmium (Os) is the densest naturally occurring element. a. What is the density of this element (in g/cm) if we know a single atom of osmium occupies a volume of 13.981 A3? b. What is the radius (in inches) of a sphere of osmium containing 2.831 mol of osmium atoms?
Boron, atomic number 5, occurs naturally as two isotopes (10B and 11B) with natural abundances of...
Boron, atomic number 5, occurs naturally as two isotopes (10B
and 11B) with natural abundances of 19.9% and 80.1% respectively.
In what ways do the two isotopes differ? Do the electronic
configurations differ? Draw the orbital diagram for 11B. Which
electrons are the valence? Give three ways the 1s and 2s orbitals
differ for this element. Elemental boron reacts withF2 gas to form
BF3(g). Write balance equation for this reaction. If the delta Hf
for BF3 is -1135.6 kJ/mol, find...
Boron has two naturally occurring isotopes, 10B and 11B. The ratio of the numeric abundances may...
Boron has two naturally occurring isotopes, 10B and
11B. The ratio of the numeric abundances may vary for
samples derived from diverse natural sources.
A
4.02668
E
4.02709
B
4.02553
F
4.02747
C
4.02404
G
4.02480
D
4.02417
H
4.02598
Sample E was analyzed five times giving
4.02709 and s = 0.00007.
The 99% confidence interval for sample E is:
4.02709± ???
Osmium (76Os) has seven naturally occurring isotopes, six of which are stable. Osmium 193 is a...
Osmium (76Os) has seven naturally occurring isotopes, six of
which are stable. Osmium 193 is a beta-emitter. A sample of 193Os
with mass of 58.36 μg emits 13.52×108 β
particles in a time interval of 32 min. What is the half-life
(in years) of this nuclide?
1-\Naturally occurring copper exists in two isotopic forms: 63Cu and65Cu. The atomic mass of copper is...
1-\Naturally occurring copper exists in two isotopic forms:
63Cu and65Cu. The atomic mass of copper is
63.55 amu. What is the approximate natural abundance of
63Cu?
Select one:
a.
63%
b.
90%
c.
70%
d.
30%
e.
50%
1-\The molar mass of the compound formed by potassium and sulfur
is _____.
Select one:
a.
110.3 g/mol
b.
135.3 g/mol
c.
103.2 g/mol
d.
71.2 g/mol
e.
149.4 g/mol
How many oxygen atoms are there in one formula unit of
Ca3(PO4)2?...
If an element has an atomic number of 7 and an atomic mass number of 15,...
If an element has an atomic number of 7 and an atomic mass
number of 15, how many protons, neutrons, and electrons does it
possess?
a) 7 protons, 8 neutrons, and 7 electrons
b) 7 protons, 8 neutrons, and 8 electrons
c) 8 protons, 7 neutrons, and 8 electrons
d) 15 protons, 8 neutrons, and 8 electrons
Button type Number of buttons Mass of sample (g) Atomic mass of isotopes % Abundance 2...
Button type
Number of buttons
Mass of sample (g)
Atomic mass of isotopes
% Abundance
2 holes
25
44.64
3 holes
15
23.52
4 holes
12
15.19
To complete the last to columns, and then calculate the atomic
mass of the element Buttonium.
A) To complete the atomic mass of each isotope , obtain the
average mass of a button in each sample by dividing the mass of the
sample by the number of buttons in the sample. Show your...
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