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Arlecino [84]
3 years ago
10

[OU.04] An astronomer has proposed a new theory about the evolution of the universe. Which of these would prevent the proposed t

heory from being discarded? (2 points) discussion about the theory on television explanation of the theory by some students publication of the theory in a science magazine acceptance of the theory by a majority of scientists
Chemistry
2 answers:
koban [17]3 years ago
6 0

Answer:

Acceptance of the theory by a majority of scientists.

Explanation:

A proposed theory could be rejected when it is tested and does not provide the same results by different scientists. If same evidence is gathered by majority of the scientists, then it is accepted. A new theory is accepted when it gives the same results on multiple testing.

Oduvanchick [21]3 years ago
5 0
Acceptance of the theory by a majority of scientists
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The dehydrogenation of benzyl alcohol to make the flavoring agent benzaldehyde is an equilibrium process described by the equati
valkas [14]

Answer:

(a) p_{C6H5CH2OH}=2.14x10^{-3}atm

(b) Dissociation =0.99

Explanation:

Hello,

(a) In this case, for the given chemical reaction, the law of mass action becomes:

Kc=\frac{[C6H5CHO][H2]}{[C6H5CH2OH]}

In such a way, as 1.20 g of benzyl alcohol are placed into a 2.00-L vessel, the initial concentration is:

[C6H5CH2OH]_0=\frac{1.20g*\frac{1mol}{108.14g} }{2.00L} =5.55x10^{-3}M

Hence, by writing the law of mass action in terms of the change x due to equilibrium:

Kc=\frac{(x)(x)}{5.55x10^{-3}-x}=0.558

Solving for x by using a quadratic equation one obtains:

x=5.50x10^{-3}M

Thus, the equilibrium concentration of benzyl alcohol is computed:

[C6H5CH2OH]_{eq}=5.55x10^{-3}M-5.50x10^{-3}M=5x10^{-5}M

With that concentration the partial pressure results:

p_{C6H5CH2OH}=[C6H5CH2OH]_{eq}RT =5x10^{-5}\frac{mol}{L} *0.082\frac{atm*L}{mol*K}*523K \\p_{C6H5CH2OH}=2.14x10^{-3}atm

(b) Now, the fraction of benzyl alcohol that is dissociated relates its equilibrium concentration with its initial concentration:

Dissociation=\frac{C6H5CH2OH_{eq}}{C6H5CH2OH_0} =\frac{5.50x10^{-3}M}{5.55x10^{-3}M} =0.99

Best regards.

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The evidence that a chemical reaction occurred is can be change in color , formation of a precipitate , Here in the case when 6 m HCl to the solution of sodium acetylsalicylate, the formation of precipitate that is of aspirin takes places that can be taken as a evidence that a reaction is occured. The reaction can be seen in the image attached.

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2H₂ + O₂ -&gt; 2H₂O In this equation, write the coefficient numbers<br><br><br> HELP ME PLEASEEEE
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