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2 years ago

How many cookies are there in one mole of cookies?

Chemistry

1 answer:

Jet001 [13]2 years ago

3 0

what's the full question so i can give you an answer?

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What are three reasons that using renewable energy is important.

wariber [46]

Answer:

1. they reduce green house gases

2. they can last a long time and come back pretty much every year and some never run out

3. we have unlimited supply of most if not all renewable resources

Explanation:

hope this helps!

5 0

2 years ago

A buffer solution contains 0.496 M hydrocyanic acid and 0.399 M sodium cyanide . If 0.0461 moles of sodium hydroxide are added t

pochemuha

Answer : The pH of the solution is, 9.63

Explanation : Given,

The dissociation constant for HCN = $pK_a=9.31$

First we have to calculate the moles of HCN and NaCN.

$\text{Moles of HCN}=\text{Concentration of HCN}\times \text{Volume of solution}=0.496M\times 0.225L=0.1116mole$

and,

$\text{Moles of NaCN}=\text{Concentration of NaCN}\times \text{Volume of solution}=0.399M\times 0.225L=0.08978mole$

The balanced chemical reaction is:

$HCN+NaOH\rightarrow NaCN+H_2O$

Initial moles 0.1116 0.0461 0.08978

At eqm. (0.1116-0.0461) 0 (0.08978+0.0461)

0.0655 0.1359

Now we have to calculate the pH of the solution.

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

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

$pH=9.31+\log (\frac{0.1359}{0.0655})$

$pH=9.63$

Therefore, the pH of the solution is, 9.63

4 0

3 years ago

Please help me with this

Sophie [7]

Answer:

5.0 38 84.0 749.7 528.0 729.0 738.9 739.0

7 0

1 year ago

Identify two factors that can produce metamorphic rocks

alexdok [17]

Heat & pressure. hope this helps

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3 years ago

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some studies has shown that peppermint odor increase people's mental sharpness especially when they solve math problems which be

Fed [463]

"if it is tested in a controlled setting with repeated results" is the statement among the choices given in the question that best describes that can possibly make this scientific claim valid. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has helped you.<span>
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2 years ago

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