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2 years ago

In which type of climate would the soil most likely be well developed and have lots of organic matter?

1 answer:

3 0

I suppose it would be forest because in order to have organic matter the soil needs to be rich and fertile,therefore it is forest.

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Plz helpp<br>Which pH value indicates the solution with the highest concentration of hydronium ions

navik [9.2K]

Answer:

Hydronium ion concentrations increase with decreasing pH values. So, the solutions with the lower pH values have the higher H₃O⁺ concentrations.

Explanation:

4 0

2 years ago

In a sample of UO 2, the uranium has been enriched so that 3.0% of it is 235U. How long could the fissioning of the uranium in t

8090 [49]

Explanation:

Molecular mass of $UO_{2}$ is the sum of molecular mass of U and $O_{2}$ molecule.

Molar mass of $UO_{2}$ = (238 + 32) g/mol

= 270 g/mol

Hence, in 1 kg there are 1000 grams. So, total number of atoms given molecules present in 1 kg will be calculated as follows.

$\frac{1000 g}{270 g/mol} \times 6.023 \times 10^{23}atoms$

= $2.229 \times 10^{24}$

Hence, number of $^{235}U$ = $\frac{3}{100} \times 2.229 \times 10^{24}$

= $6.69 \times 10^{22}$

Now, let x seconds is required for burning 100 W lamp bulb. As 200 MeV is released per reaction.

100 x = $6.69 \times 10^{22} \times 200 \times 10^{6} \times 1.6 \times 10^{-19}$

x = $21.4 \times 10^{9}$ sec

Converting this value of x into years as follows.

x = $\frac{21.4 \times 10^{9}}{3600 \times 24 \times 365}$

x = $6.8 \times 10^{2}$ years

Thus, we can conclude that fissioning of the uranium in given situation requires $6.8 \times 10^{2}$ years to keep a 100 W lamp burning.

6 0

3 years ago

a. Un estereoisómero del 1,1,3,5-tetrametilciclohexano es 15 kJ/mol (3.7 kcal/mol) menos estable que el otro. Indicar cuál isóme

kari74 [83]

The cis isomer of 1, 1, 3, 5-tetramethylcyclohexane is more stable than the trans of 1, 1, 3, 5-tetramethylcyclohexane. This also implies that former has a higher stability and energy than the later.

<h3>Stable 1, 1, 3, 5-tetramethylcyclohexane</h3>

The picture attached to this answer sheet is cis isomer of 1, 1, 3, 5-tetramethylcyclohexane

Also even, the cis isomer of 1, 1, 3, 5-tetramethylcyclohexaneexist in two forms

Diaxial form
Diequatorial form

Learn more about organic compounds:

brainly.com/question/704297

7 0

2 years ago

If you cut an apple into slices and leave them in the open air, they will slowly turn brown. What kind of chemical change is thi

cupoosta [38]

Answer:

Due to oxidation process apple gets brown color.

Explanation:

When we cut the apple it turn brown in color because of the oxidation process. The peel of apple protect it from the oxidation. When the apple is peel off the oxygen and water molecules in air react with it and oxidation take place. The oxidation process is very efficient in ambient temperature.

For example, if the peal off apple is placed into the refrigerator it take a time to got oxidize and turn brown, but if it is placed in room temperature it quickly turn brown.

when oxygen is react with peel off apple , it trigger the polyphenol oxidase enzyme to oxidize the phenolic compound and quinones are formed which then react with amino acids and produced brown color.

3 0

3 years ago

How many grams of potassium chloride are in 6.90 moles? 10.8g 74.6g 257g 514g

Vedmedyk [2.9K]

The potassium chloride is KCl. The gram formula mass of KCl is 39+35.5=74.5 g/mol which means 74.5 g per mole of KCl. So the mass of KCl is 6.90*74.5=514 g.

3 0

2 years ago