Question
In: Chemistry
Scandium occurs in nature as a single isotope, scandium-45. Neutron irradiation produces scandium-46, which is radioactive...
Scandium occurs in nature as a single isotope, scandium-45. Neutron
irradiation produces scandium-46, which is radioactive with a half
life of 83.8 days. How long will it take to reduce the amount of
scandium from 1.00 g to 0.045 g?
Solutions
queen_honey_blossom answered 2 years agoRelated Solutions
Which type of nuclear decay is the following radioactive isotope likely to undergo? All known stable...
Which type of nuclear decay is the following radioactive isotope likely to undergo?
All known stable isotopes are shown on the graph. The points form what is know as the "belt of stability".
If a radioactive isotope is above the belt of stability, think about what type of decay would decrease its N/Z ratio. If an unstable isotope is below the belt of stability, think about what type of decay would increase its N/Z ratio. If a radioactive isotope is...
Potassium-40 is a radioactive isotope of potassium, a very common element in terrestrial rocks, which decayrs...
Potassium-40 is a radioactive isotope of potassium, a very
common element in terrestrial rocks, which decayrs to Ar-40 with a
half-life of 1.28x10^9 years. By measuring the ratio of Ar-40 to
K-40, geologists can determine the age of ancient rocks.
40 K ----> 40 Ar + 0/1e+
40 K ----> 40 Ca + 0/-1e-
A) Why might K-40 decay by two different pathways?
B) Only about 11% of the K-40 decays to Ar-40. If the ratio of
Ar-40 to K-40...
Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is...
Many computer chips are manufactured from silicon, which occurs
in nature as SiO2. When SiO2 is heated to melting, it reacts with
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industrial preparation of silicon, 156.4 kg of SiO2 is allowed to
react with 79.0 kg of carbon to produce 66.2 kg of silicon
A) Determine the theoretical yield for the reaction. Express
your answer using four significant figures
B)Determine the percent yield for the reaction.
Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is...
Many computer chips are manufactured from silicon, which occurs
in nature as SiO2. When SiO2 is heated to melting, it reacts with
solid carbon to form liquid silicon and carbon monoxide gas. In an
industrial preparation of silicon, 156.7 kg of SiO2 is allowed to
react with 78.2 kg of carbon to produce 66.2 kg of silicon.
1.) Determine the limiting reactant for the reaction.
2.) Determine the theoretical yield for the reaction.
3.) Determine the percent yield for the...
Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is...
Many computer chips are manufactured from silicon, which occurs
in nature as SiO2. When SiO2 is heated to melting, it reacts with
solid carbon to form liquid silicon and carbon monoxide gas. In an
industrial preparation of silicon, 156.7 kg of SiO2 is allowed to
react with 78.2 kg of carbon to produce 66.2 kg of silicon.
Once the reaction has occurred as completely as possible, what
mass (in g) of the excess reactant is left?
Use the following information for Exercises 10-45, 10-46, and 10-47: Cinturon Corporation produces high-quality leather belts....
Use the following information for Exercises 10-45,
10-46, and 10-47:
Cinturon Corporation produces high-quality leather belts. The
company's plant in Boise uses a standard costing system and has set
the following standards for materials and labor:
leather (3 strips @ $4) $12.000
direct labor (0.75 hr @ $12.00). 9.00
total prime cost $21.00
During the first month of the year, the Boise plant produced
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Assume in a simple example that something occurs in an economy which produces “Good X” that...
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1. The absorption of x-rays in a patient occurs via the photoelectric effect, which produces an...
1. The absorption of x-rays in a patient occurs via the
photoelectric effect, which produces an electron and a photon.
Describe this absorption process in about 3-4 sentences and a
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Soft Corp, which produces a single product – a memory foam pillow, has provided you with...
Soft Corp, which produces a single product – a memory foam
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Production volume .............................................
2,000 units 4,000 units Direct materials
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$15.40 per unit Direct labor
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unit $16.50 per unit Manufacturing overhead
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