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scoundrel [369]
3 years ago
9

Que significa arte m m k,

Chemistry
1 answer:
Svetradugi [14.3K]3 years ago
7 0

Answer:

Explanation:

huh

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Which carbon skeleton represents a ketone?<br> c-c-c-c=0<br> C-C-C-C-0<br> C-C-C-C-o<br> C-C-0-C
aliina [53]

Answer:

None of the options are correct

Explanation:

Ketone is an organic compound with general formula RCOR' ie RC=OR where R and R' are alkyl groups. Example of ketone can be written as:

C—C—C=O—C

8 0
3 years ago
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Sodium has the atomic number 11. How many electrons are in a sodium ion, which has the symbol Na+? 10 11 12 NextReset © 2017 Edm
Anna71 [15]
Na 1s²2s²2p⁶3s¹
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3 years ago
A solution of hydrochloric acid of unknown concentration was titrated with 0.10 M NaOH. If a 100.-mL sample of the HCl solution
madam [21]

<u>Answer:</u> The initial pH of the HCl solution is 3

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HCl

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=1\\M_1=?M\\V_1=100mL\\n_2=1\\M_2=0.10M\\V_2=1mL

Putting values in above equation, we get:

1\times M_1\times 100=1\times 0.10\times 1\\\\M_1=\frac{1\times 0.10\times 1}{1\times 100}=10M

1 mole of HCl produces 1 mole of H^+ ions and 1 mole of Cl^- ions

To calculate the pH of the solution, we use the equation:

pH=-\log[H^+]

We are given:

[H^+]=0.001M

Putting values in above equation, we get:

pH=-\log (0.001)\\\\pH=3

Hence, the initial pH of the HCl solution is 3

6 0
3 years ago
Why do you think the placebo effect works
timurjin [86]

Answer:

The placebo effect is when an improvement of symptoms is observed, despite using a nonactive treatment. It’s believed to occur due to psychological factors like expectations or classical conditioning.

Research has found that the placebo effect can ease things like pain, fatigue, or depression.

hope this will help u :)

7 0
3 years ago
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