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olganol [36]
2 years ago
10

How do I convert the ones circled in red? Please explain how you did it don’t just do it for me.

Chemistry
1 answer:
Nana76 [90]2 years ago
3 0

Answer:

25 centigrams is equal to 2.5 grams.

150 hectometers are 10,000 centimeters.

Explanation:

10 centigrams is equal to 0.1 gram.

25 / 10 = 2.5

1 hectometer is equal to 10,000 centimeters.

150 x 10,0000 = 1500000

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8 0
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Acetic acid is a weak acid with a pKa of 4.76. What is the concentration of acetate in a buffer solution of 0.2M at pH 4.9. Give
Ghella [55]

Answer:

[base]=0.28M

Explanation:

Hello,

In this case, by using the Henderson-Hasselbach equation one can compute the concentration of acetate, which acts as the base, as shown below:

pH=pKa+log(\frac{[base]}{[acid]} )\\\\\frac{[base]}{[acid]}=10^{pH-pKa}\\\\\frac{[base]}{[acid]}=10^{4.9-4.76}\\\\\frac{[base]}{[acid]}=1.38\\\\

[base]=1.38[acid]=1.38*0.20M=0.28M

Regards.

6 0
2 years ago
What is the substance called that is being dissolved in a solution?
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Answer:

Solute - The solute is the substance that is being dissolved by another substance. In the example above, the salt is the solute. Solvent - The solvent is the substance that dissolves the other substance. In the example above, the water is the solvent.

Explanation:

5 0
3 years ago
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7 0
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