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olga nikolaevna [1]
3 years ago
5

All of the factors described below could account for the difference in the sizes of the tomatoes. Which describes a way in which

biotechnology could have caused this difference?
A. The plant on the left received more water.
B. The plant on the left was exposed to more hours of sunlight each day.
C. The plant on the left grew in an area with fewer pests.
D. The plant on the left is the result of selective breeding of plants with large fruit.
Chemistry
1 answer:
disa [49]3 years ago
3 0

Answer:

D my guy

Explanation:

I have a hunch if its biotechnology involved with plants selective breeding seems most appropriate

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Answer:

It's IF5. ................

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How many valence electrons in Al3+?
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Aluminum has an atomic number of 13. The electronic configuration of Al is 1s2 2s2 2p6 3s2 3p1. Al3+ has only 10 electrons so the configuration of Al 3+ is 1s2<span> 2s</span>2<span> 2p</span><span>6. The highest energy level is 2 so the number of electrons in the highest level is the valence electrons which is 8.</span>
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Which of the following molecules will exhibit hydrogen bonding?
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Answer:

B. HF

Explanation:

Hydrogen bonding is basically a bond between hydrogen and an electronegative element particularly the second-row elements nitrogen (N), oxygen (O), or fluorine (F).

option A.

Although oxygen is present, there are no  O - H bond present. The oxygen is bonded to two carbon atoms hence hydrogen bonding is absent.

option B.

Hydrogen is bonded directly to Flourine. Hydrogen bond is present.

option C.

This is an organic compound, only covalent bonds are present in this molecule. No hydrogen bonds,

option D.

Lithium does snot have high electronegativity hence hydrogen bonding is absent.

6 0
4 years ago
What mass of Fe can be produced by the reaction of 75.0 g CO with excess Fe2O3 according to the equation: Fe2O3(s) + CO(g) → Fe(
lyudmila [28]

Here we have to get the mass of the iron (Fe) produces in the reaction between ferric oxide (Fe₂O₃) and carbon monooxide (CO) to produce carbon dioxide and iron.

The amount of Fe produced in the reaction is B. 99.7g.

The balanced form of the reaction given is: Fe₂O₃ (s) + 3CO = 2Fe + 3CO₂.

Now as per the reaction 3 moles of CO produce 2 moles of Fe.

The molar mass of CO and Fe are 28.01g/mol and 55.845g/mol.

Thus (3×28.01) 84.03g of CO produces 111.69g of Fe.

Hence, 75.0g of CO produces \frac{111.69}{84.03}×75.0 = 99.687g of Fe or 99.7g of Fe.

A. If in the reaction 49.8g Fe is produced in the reaction then \frac{84.03}{111.69}×49.8 = 37.467g of CO should react. Thus the option is wrong.

C. To produce 224g of Fe \frac{84.03}{111.69}×224 = 168.526g of CO will consumed. Thus it is wrong statement.

D. To generate 299g of Fe \frac{84.03}{111.69}×299 = 224.952g of CO will consumed. Thus it is wrong statement.

7 0
4 years ago
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Suppose a gas mixture used for anesthesia contains 4.60 mol oxygen (O₂) and 6.00 mol nitrous oxide (N₂O). The total pressure of
julia-pushkina [17]

Considering the definition of mole fraction, the mole fraction of O₂ in the mixture is 0.434.

<h3>Definition of mole fraction</h3>

The molar fraction is a way of measuring the concentration that expresses the proportion in which a substance is found with respect to the total moles of the solution.

In other words, the mole fraction expresses the concentration of solute in a solution as the ratio of moles of substance to total moles of solution:

mole fraction=\frac{moles of substance}{moles of solution}

<h3>Mole fraction of O₂ in this mixture</h3>

In this case, you know a gas mixture used for anesthesia contains 4.60 mol oxygen (O₂) and 6.00 mol nitrous oxide (N₂O).

So, the total moles of the solution can be calculated as:

Total moles = moles of oxygen (O₂) + moles of nitrous oxide (N₂O)

Then:

Total moles= 4.60 moles + 6 moles

Total moles= 10.60 moles

Finally, the more fraction of O₂ can be calculated as follow:

Mole fraction of O_{2} =\frac{moles of O_{2}}{total moles}

Mole fraction of O_{2} =\frac{4.60 moles}{10.6o moles}

Solving:

<u><em>Mole fraction O₂ = 0.434</em></u>

Finally, the mole fraction of O₂ in the mixture is 0.434.

Learn more about mole fraction:

brainly.com/question/14434096

brainly.com/question/10095502

#SPJ1

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