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3 years ago

Explain why the term recycling is an excellent description of plate tectonics

1 answer:

4 0

We may not see notice it but plate tectonics actually have a "recycle" process. However, scientist reported that it happens in a span of 500 million years. Over the years, the oceanic crusts are pressured to the topmost layer of the mantle causing the oceanic crusts to melt and mix with the Earth's mantle. Such crust blending results to the formation of volcanoes underwater. In time, the said volcanoes would erupt causing the formation of new oceanic and continental crusts.

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Which resource is renewable?<br> coal <br> oil<br> steel<br> wind

Digiron [165]

Answer: wind

Explanation:

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3 years ago

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Why does common table salt (NaCl) have a high melting point?

Artist 52 [7]

COmmon table salt (NaCl) have a high melting point b<span>ecause it is ionically bonded and it takes a lot of energy to break the electrostatic attractions between the cations and the anions. Hope this answers the question. Have a nice day.</span>

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3 years ago

A 110.0 mL sample of 0.040 M Ca2+ is titrated with 0.040 M EDTA at pH 9.00. The value of logKf for the Ca2+−EDTA complex is 10.6

Alex787 [66]

Answer : The conditional formation constant is $1.83\times 10^9$

Explanation :

First we have to calculate the formation constant.

As we are given that:

$\log k_f=10.65$

$k_f=10^(10.65)$

$k_f=4.47\times 10^{10}$

Thus, the formation constant is $4.47\times 10^{10}$

Now we have to calculate the conditional formation constant.

The expression used as:

$k'_f=\alpha_y^+\times k_f$

where,

$k'_f$ = conditional formation constant = ?

$\alpha_y^+$ = activity coefficient at pH 9.00 = 0.041

$k_f$ = formation constant = $4.47\times 10^{10}$

Now put all the given values in the above expression, we get:

$k'_f=(0.041)\times (4.47\times 10^{10})$

$k'_f=1.83\times 10^9$

Therefore, the conditional formation constant is $1.83\times 10^9$

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3 years ago

Which of the following combinations can be used to prepare a buffer at ph 1

xeze [42]

A buffer is a solution which resists changes to it pH when a small quantity of acid or base is added to it.

<h3>What is a buffer?</h3>

A buffer is a solution which resists changes to it pH when a small quantity of acid or base is added to it.

Buffers are made from solutions of weak acids and their salts or weak bases and their salts.

The pH of a solution is the negative logarithm to base 10 of yhe hydrogen ion concentration of the solution.

Solutions of low pH have high concentration of hydrogen ions while solutions of high pH have high hydrogen ion concentration.

Learn more about about buffers and pH at: brainly.com/question/22390063

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3 years ago

President George Washington’s leadership during

erastova [34]

President George Washington’s leadership during the Whiskey Rebellion (1794) was important because it "(1) showed the ability of the new government to
<span>enforce federal law"</span>

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3 years ago