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3 years ago

Explain what the horizontal and vertical lines of a Fischer Projection indicate about the structure of the molecule

Chemistry

1 answer:

gulaghasi [49]3 years ago

7 0

Explanation:

Fischer Projections allow to represent the three dimensional molecular structures in two dimensional environment without the change in the properties or the structural integrity of the compound. <u>It consists of horizontal as well as vertical lines both, where horizontal lines represent atoms which are pointed toward viewer while vertical line represents atoms which are pointed away from viewer. </u>The point of the intersection between horizontal and vertical lines represents central carbon.

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a factor of 8, it means that A is now only 1/8 of its original concentration. A first order reaction, where A → products, has a

Trava [24]

Answer:

It takes 1.32x10⁻⁷s for the concentration of A to fall by a factor of 8

Explanation:

The equation that represents a first-order kinetics is:

Ln ([A] / [A]₀] = -kt

<em>Where [A] is actual concentration, [A]₀ is initial concentration, K is rate constant (For the given problem, 1.57x10⁷s⁻¹ and t is time.</em>

<em />

As you want the time when you have [A] in a factor of 8 = [A] / [A]₀ = 1/8

Replacing:

Ln ([A] / [A]₀] = -kt

Ln (1/8) = -1.57x10⁷s⁻¹*t

t = 1.32x10⁻⁷s

<h3>It takes 1.32x10⁻⁷s for the concentration of A to fall by a factor of 8</h3>

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3 years ago

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Yakvenalex [24]

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3 years ago

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How many molecules are in 30 liters of methane (CH4) at STP?

mylen [45]

Hello!

How many molecules are in 30 liters of methane (CH4) at STP ?

We have the following information:

Knowing that by Avogadro's Law for each mole of substance we have 6.02 * 10²³ molecules, it is known that in STP (Standard Temperature and Pressure) one mole of any gas equals 22.4 L, then:

22.4 L ----------------- 6.02*10²³ molecules

30 L -------------------- y molecules

$\dfrac{22.4}{30} = \dfrac{6.02*10^{23}}{y}$

multiply the means by the extremes

$22.4*y = 30*6.02*10^{23}$

$22.4*y = 1.806*10^{25}$

$y = \dfrac{1.806*10^{25}}{22.4}$

$\boxed{\boxed{y = 8.0625*10^{23}\:molecules}}\:\:\:\:\:\:\bf\green{\checkmark}$

Answer:

8.0625*10²³ molecules of methane

________________________

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3 years ago

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Luden [163]

It will be reduced to Water vapour

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Vlad1618 [11]

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Explanation:

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