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UNO [17]
3 years ago
9

How many mm are equal to 21 L. How many mg are equal to 9 g. How many grams are equal to 400 kg

Chemistry
1 answer:
liberstina [14]3 years ago
8 0
<span>How many mm are equal to 21 L? 

1 L = </span>1000000 mm

Convert:-

1000000 × 21 = <span>21000000

21 l = </span><span>21000000 mm

</span><span>How many mg are equal to 9 g?

1 g = 1000 mg

Convert:-

9 </span>× 1000 = 9000

9 g = 9000 mg
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7 0
3 years ago
When sodium chloride is dissolved in water, the resulting solution is classified as a?
Mice21 [21]
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6 0
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jonny [76]

The volume of the buffer solution having a ph value is calculated by henderson's hasselbalch equation.

Buffer solution is water based solution which consists of a mixture containing a weak acid and a conjugate base of the weak acid. or a weak base and conjugate acid of a weak base.it is a mixture of weak acid and a base. The pH of the buffer solution is determined by the expression of the henderson hasselbalch equation.

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Where, pKa =dissociation constant , A- = concentration of the conjugate base, [HA]= concentration of the acid. Here, a buffer solution contains 0.403m acetic acid  and 250 ml is added  in order to prepare a buffer with a ph of 4.750. Putting all the values in the henderson hasselbalch equation we find the pH of the buffer solution.

To learn more about hendersons hasselbalch equation please visit:

brainly.com/question/13423434

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6 0
11 months ago
I think it’s b but I’m not sure
suter [353]
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3 years ago
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iVinArrow [24]
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Hope that helps :)
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