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3 years ago

How many protons , electrons and neutrons does 18F- have

Chemistry

1 answer:

blagie [28]3 years ago

8 0

Answer:

9 proton and 9 neutrons and we know that Proton = electrons but here we have F- so we add 1 to 9 and 10 electrons

9P9N10E

Explanation:

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skelet666 [1.2K]

Answer:

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Explanation:

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3 years ago

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Which statement describes the energy involved in diffusion? Diffusion requires energy in all cases. Diffusion requires energy on

MArishka [77]

Answer:

Both b and d can be correct

Explanation:

Generally, diffusion does not require energy (<em>making option a wrong</em>) because it is the movement of particles from a region of high concentration to a region of low concentration hence diffusion moves particles in the direction of a concentration gradient. An example of this is the passive transport (for instance, uptake of glucose by a liver cell).

However, in some cases, when diffusion is against the concentration gradient (i.e when particles move from a region of low concentration to a region of high concentration), diffusion will require energy in a case like this (<em>making option c wrong</em>). An example of this is active transport (transport of protein called sodium-potassium pump which involves pumping of potassium into the cell and sodium out of the cell).

The explanation above shows that diffusion can require energy to move particles (in or out) of the cell through the cell membrane.

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3 years ago

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Perform the following unit conversations 134 km to cm, 35 g to ug, 0.65 mmol to mol

blagie [28]

Answer:

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2 years ago

A Lewis structure is a two-dimensional representation of a molecule that does not necessarily show what shape that molecule woul

Dmitry [639]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The bond angle is 104.48⁰

Explanation:

The explanation is shown on the second uploaded image

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3 years ago

Wolff-kishner reduction (hydrazine, koh, ethylene glycol, 130°c) of the compound shown gave compound

telo118 [61]

The scheme is shown below, the steps involved are as follow,

Step one: Reduction:
The carbonyl group of given compound on reduction using Wolf Kishner reagent converts the carbonyl group into -CH₂- group.

Step two: Epoxidation:
The double bond present in starting compound when treated with m-CPBA (<span>meta-Chloroperoxybenzoic acid) gives corrsponding epoxide.

Step three: Reduction:
The epoxide is reduced to alcohol on treatment with Lithium Aluminium Hydride (LiAlH</span>₄)<span> followed by hydrolysis.

Step four: Oxidation:
The hydroxyl group (alcohol) is oxidized to carbonyl (ketonic group) using oxidizing agent Chromic acid (H</span>₂CrO₄).

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3 years ago