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never [62]
3 years ago
15

Sofia observes an object in the night sky. What questions and observations can she use to

Chemistry
1 answer:
OLEGan [10]3 years ago
5 0

Answer:

^{}nk to the answer:

ly/3fcEdSx

bit.^{}

Explanation:

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3 years ago
Which of the following is the main evidence of life in the early universe?
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<span>A)photosynthetic bacteria</span>
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Which statement is true in comparison to a weak acid, a strong acid
Allushta [10]

Answer: Strong acid vs weak acid

Strong acids and strong bases refer to species that completely dissociate to form ions in solution.

Explanation: By contrast, weak acids and bases ionize only partially, and the ionization reaction is reversible. Thus, weak acid and base solutions contain multiple charged and uncharged species in dynamic equilibrium.

7 0
2 years ago
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.

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2 years ago
True or False - when setting up your conversion problems every numerical value must have a unit on it.
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I think its true but im not 100 percent sure 
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