The average person in the United States is exposed to the following amount of radiations annually. Rank the following source of
2 answers:
Answer:
The increasing order of the ability to cause harm to living tissue:
Weapons < Television tubes < Nuclear medicine < Cosmic radiation <Ground < Diagnostic X rays < Air (radon-222)
Explanation:
Here, the ability of the radiation to harm living tissue is measured in terms of millirem
Unit conversion:
The given radiation doses can be converted into units of millirems for comparison:
Weapons test fallout = 1 millirem
Cosmic radiation = 26 millirems
Air (radon-222) = 0.198 rems = 198 millirems
Diagnostic X rays = 0.040 rems = 40 millirems
Television tubes = 11 millirems
Nuclear medicine = 0.015 rems = 15 millirem
Ground = 33 millirems
Since a greater dosage of radiation would lead to greater risk, the increasing order of their ability to cause harm to living tissue would be:
Weapons < Television tubes < Nuclear medicine < Cosmic radiation <Ground < Diagnostic X rays < Air (radon-222)
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The alcohol concentration of the mixed solution is 20%
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Answer:
pH=11.
Explanation:
Hello!
In this case, since the data is not given, it is possible to use a similar problem like:
"An analytical chemist is titrating 185.0 mL of a 0.7500 M solution of ethylamine(C2HNH2) with a 0.4800 M solution of HNO3.ThepK,of ethylamine is 3.19. Calculate the pH of the base solution after the chemist has added 114.4 mL of the HNO3 solution to it"
Thus, for the reaction:
Tt is possible to compute the remaining moles of ethylamine via the following subtraction:
Thus, the concentration of ethylamine in solution is:
Now, we can also infer that some salt is formed, and has the following concentration:
Therefore, we can use the Henderson-Hasselbach equation to compute the resulting pOH first:
Finally, the pH turns out to be:
NOTE: keep in mind that if you have different values, you can just change them and follow the very same process here.
Best regards!
Answer:
Anion Gained 3 18
Cation Lost 2 36
Cation Lost 3 23
Explanation:
Looking at the ionic notation, the negative symbol (-) indicates that there are more electrons than protons and the positive symbol (+) indicates that there are more protons than electrons.
The number tells you how many was gained or lost.
To determine how many electrons are left, you base this off how many protons there are. The number of protons in an atom is expressed by the atomic number. In a stable atom, you have an equal number of protons and electrons.
Ions occur when electrons are gained or lost.
A cation is positively charged because it LOST an electron. Since there are more protons than electrons, the charge would be positive.
An anion is negatively charged because it gained an electron. Since there are more electrons than protons, the charge would be negative.
Using the explanation above, you can see how the answers were obtained. As for the last column, just use basic math to do this.
The atomic number of Phosphorus (P) is 15, so this means that there are 15 protons. Since it gained 3 electrons, just add 3 to 15:
15 + 3 = 18
Sr has an atomic number 38. Since it lost 2 electrons, just subtract 2 from the atomic number.
38-2 = 36
Fe has an atomic number 26. It lost 3 electrons, so we subtract again.
26-3 = 23