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Maurinko [17]
3 years ago
7

Need these ASAP ignore the use evidence from the text in question 1

Chemistry
1 answer:
mr Goodwill [35]3 years ago
6 0
It requires more energy to boil an substance than to melt it (with special exceptions). When something is boiled you are furthering the distance between the already stretched out molecules which will require more energy to do so, also in most cases you will be creating a vapor from boiling which has a high kinetic energy value.
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If a solution has a pOH of 8.71, what is the [H+]?
TEA [102]

Answer: 5.1\times 10^{-6}M

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

pH=-\log [H^+]

pH+pOH=14

Putting in the values:

pH=14-8.71=5.29

5.29=-log[H^+]

[H^+]=5.1\times 10^{-6}

Thus [H^+] is 5.1\times 10^{-6}M

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How many moles of KCL is in a 3M solution of KCL
netineya [11]

Answer:

223.6539

Explanation:

1 mole is equal to 1 moles KCl, or 74.5513 grams

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Because displacement of water is the convenient way to obtain gas.
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The diagram shows the electron arrangement in a molecule of ammonia, showing only outer
rusak2 [61]

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Can someone please help me ANSWER this question down below?
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