I think the correct answer from the choices listed above is option A. The three components of air are all <span>classified as pure substances since they are not chemically bonded so they can be separated by certain processes and be present as a pure substance. Hope this answers the question.</span>
Answer:
Here's what I find.
Explanation:
Iodine-131
Iodine-131 is both a beta emitter and a gamma emitter.
About 90 % of the energy is β-radiation and 10 % is γ-radiation. Both forms are highly energetic.
The main danger is from ingestion. The iodine concentrates in thyroid gland, where the β-radiation destroys cells up to 2 mm from the tissues that absorbed it.
Both the β- and γ-radiation cause cell mutations that can later become cancerous. Small doses, such as those absorbed from the nuclear disasters in the Ukraine and Japan, can cause cancers years after the original iodine has disappeared.
Plutonium-239
Plutonium-239 is an alpha emitter.
Alpha particles cannot penetrate the skin, so external exposure isn't much of a health risk.
However, they are extremely dangerous when they are inhaled and get inside cells. They travel first to the blood or lymph system and later to the bone marrow and liver, where they cause up to 1000 times more chromosomal damage than beta or gamma rays.
It takes about 20 years for plutonium to be eliminated from the liver around 50 years for from the skeleton, so it has a long time to cause damage.
We are given
<span>Ox: Sn(s) → Sn2+ (aq, 1.85 M) + 2e−
Red: ClO2 (g, 0.150 atm ) + e− → ClO−2 (aq, 2.00 M)
We are to compute the cell potential at 25 </span>°C
We simply have to look for the standard potentials for each of the reactions and subtract the redox standard potential from the oxidation standard potential.
From literature and after doing the operation, the answer is
Ecell = 2.2 V
The % error in the student’s data is
Correct score - run score/ correct score * 100
In run 1 we have
0.2542 - 0.2541/0.2542 * 100 = 0.000393391031 = 0.03933%
In run 2 we have
0.2542 - 0.2668/0.2542 * 100 = -0.00495672699 = -0.495%
In run 3 we have
0.2542 - 0.2549/0.2542 * 100 = -0.00275373721 = -0.275%
And run 4 we have
0.2542 - 0.2554/0.2542 * 100 = 0.00495672699 = 0.495
The spread are 0.2542 - 0.2541 = 0.0001 and 0.2542 - 0.2668 = -0.0126
Also 0.2542 - 0.2549 = -0.0007 and 0.2542 - 0.2554 = -0.0012
I would say B I’m not sure but I hope it is correct!