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liubo4ka [24]
3 years ago
10

Which of the following atoms has the same number of neutrons as 19F? (2 points)

Chemistry
1 answer:
Lelu [443]3 years ago
5 0
I dont know the answer choices but if isotopes is there then go with Isotopes

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The answer is 3.6 x 10^-6
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At a certain temperature the vapor pressure of pure thiophene is measured to be . Suppose a solution is prepared by mixing of th
Lesechka [4]

Answer:

0.35 atm

Explanation:

It seems the question is incomplete. But an internet search shows me these values for the question:

" At a certain temperature the vapor pressure of pure thiophene (C₄H₄S) is measured to be 0.60 atm. Suppose a solution is prepared by mixing 137. g of thiophene and 111. g of heptane (C₇H₁₆). Calculate the partial pressure of thiophene vapor above this solution. Be sure your answer has the correct number of significant digits. Note for advanced students: you may assume the solution is ideal."

Keep in mind that if the values in your question are different, your answer will be different too. <em>However the methodology will remain the same.</em>

First we <u>calculate the moles of thiophene and heptane</u>, using their molar mass:

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Total number of moles = 1.63 + 1.11 = 2.74 moles

The<u> mole fraction of thiophene</u> is:

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Finally, the <u>partial pressure of thiophene vapor is</u>:

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3 0
3 years ago
Consider the reaction of A(g) + B(g) + C(g) =&gt; D(g) for whichthe following data were obtained:
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Answer:

rate= k[A]²[B]²[C]

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When concentration of C is increased two times , keeping other's concentration constant, rate of reaction becomes 2 times.

So rate is proportional to [C]

So rate= k[A]²[B]²[C]

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Click on the molecules that represent transpiration.
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Transpiration is the progression of <em>water </em>inside a plant! So, the molecule representing transpiration is going to be good ol' H2O! =)
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