HELLLLP PLS 25 POINTS AND BRAINLIEST

2 answers:

5 0

During a nuclear reaction, fuel rods generate a tremendous amount of heat. ... Problems cooling these pools have officials worried that the spent rods could ... appear to be related to one or more of the spent fuel storage pools at the plant. ... These fission byproducts are also very radioactive.

does that kind of help a little?

Akimi4 [234]3 years ago

5 0

Answer:

They are scheduled for deep underground burial

Explanation:

Honestly none of these answers are correct in a sense.

They are no longer radioactive - This one is absolutely false since spent fuel rods remain dangerously radioactive for about for about 10,000 years

They contain only one type of isotope of the fuel (uranium) - There will be some 235 isotopes as well as some 238. Other isotopes might be present as well but only in very small amounts.

They usually remain radioactive for less than 100 years - As mentioned above, spent fuel rods remain dangerously radioactive for about 10,000 years.

They are scheduled for deep underground burial - This answer is probably the best as it it somewhat true. In the 1980's there was a plan launched by the federal government to bury spent fuel below Yucca Mountain in Nevada. However, this project was later called off to think of a better means of containment.

However...

Scandinavia and Finland have already approved an approach known as "deep storage" and have already begun to work on their own sites.

~Hope this helps!~

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Determine the electron-group arrangement, molecular shape, and ideal bond angle for the following molecule: PH3 Electron-group a

Alecsey [184]

Answer:

The molecular shape and ideal bond angle of the $PH_{3}$ is trigonalbipyramidal and $109.5^{o}$ respectively.

Explanation:

The structure of $PH_{3}$ is as follows.(in attachment)

From the structure,

Phosphor atom has one lone pair and three hydrogens are bonded by six electrons.

Therefore, total electrons invovled in the formation $PH_{3}$ is eight.

Hence, four electron groups which indicate the tetrahedral shape. But one pair is lone pair i.e, present on the phosphor atom.

Therefore, ideal geometry of the $PH_{3}$ molecule is Trigonalbipyramidal.

The ideal angle of trigonalbipyrmidal is $109.5^{o}$ .

All three bonds of P-H has $109.5^{o}$ .

Therefore, ideal bond angle is $109.5^{o}$ .

5 0

3 years ago

The role of sodium hydroxide in the synthesis of a chalcone is to

dalvyx [7]

Explanation:

Chemical formula of chalcone is $C_{15}H_{12}O$ and during the preparation of chalcones, a base like sodium hydroxide acts like a catalyst. This catalyst helps in the abstraction of proton from the methyl group acetophenone in order to obtain a negative charge methylene group.