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2 years ago

CAN YOU PLEASE ANSWER

Chemistry

2 answers:

aniked [119]2 years ago

4 0

Answer:

the oil spreads to cover the water

hodyreva [135]2 years ago

4 0

Answer:

I think it is ; The oil floats to the surface of the water

Explanation:

I don't know about the other one.

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X^2/2x^5=2<br><br>how do you solve this ?

Natasha2012 [34]

Answer:

$x=\sqrt[3]{\frac{1}{4}}$

Explanation:

$\displaystyle\frac{x^2}{2x^5}=2\\\\x^2=4x^5\\\\1=4x^3\\\\x^3=\frac{1}{4}\\\\\\x=\sqrt[3]{\frac{1}{4}}$

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3 years ago

Estimate the standard internal energy of formation of liquid methyl acetate (methyl ethanoate, ch3cooch3) at 298 k from its stan

LenKa [72]

solution:

$the reaction for formation of methyl acetate is\\CH_{3}OH+CH_{3}COOH----------->CH_{3}COOCH_{3}+H_{2}O\\standard internal energy \\\delta u=\delta H -\delta(pv)=\delta H -\delta n\times RT\\where \delta n=change in number of moles=0\\\delta u=\delta H\\=-442kj/mol$

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3 years ago

Read 2 more answers

How many moles in .5g of sodium bromide?

Genrish500 [490]

I'm not sure how many sign fig's you are required to have.
However I think the final answer would be 0.05 Moles, because of the .5g, that is considered 1 sign fig.

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3 years ago

. Explain why some desert animals excrete uric acid rather than ammonia.<br>(2 marks)

avanturin [10]

Answer:

AFAIK

Explanation:

uric acid is much less toxic than ammonia, hence bigger concentrations of it are tolerated in the body. This means you can excrete it while excreting very little water - beneficial wherever water's not abundant.

There's a tradeoff though, uric acid requires more energy to synthesize than ammonia, so pretty much all fish, say, excrete ammonia rather than uric acid - it's no problem to dilute ammonia since there's no water shortage.

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3 years ago

What type of reaction does this equation represent?

bonufazy [111]

Answer:

$its \: d. \: double \: replacement \: .$

Explanation:

$hope \: it \: helps \: out \:$

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4 years ago