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Orlov [11]
3 years ago
13

Your skin is an important organ and has several functions. All of the functions below are performed by the skin EXCEPT

Chemistry
1 answer:
Svet_ta [14]3 years ago
8 0

Answer:

D. works with bones to help you move

Explanation:

Your muscles and tendons are what help bones move.

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How much 2 M HBr is needed to neutralize 380 mL of 0.1 M NH4OH?
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19ml

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Andy’s golf club works with 95% efficiency. If Andy puts 120 N-m of work into his swing, how much work will the golf club put ou
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You are trying to dilute antifreeze to put in your car. You use 1.00 L of the antifreeze with a concentration of 9.24 M. You add
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3 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
4 years ago
Fossil fuels produce energy by being burned and produce which of the following emissions?
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D

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3 years ago
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