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kvasek [131]
3 years ago
10

Multiple choice (ASAP!)

Chemistry
2 answers:
kobusy [5.1K]3 years ago
7 0

Answer:

c

Explanation:

oxygen is lost electrons are added in oxidation state is decreased

Gnoma [55]3 years ago
5 0

Answer:

the correct answer is C

hope this helps <3

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KL + Pb(NO3)2 = KNO3 + PbL2 is unballanced equation, just balance from there :)

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Define measurment and its importance ​
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7. Calculate the net charge of the following atoms.
loris [4]

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Using a spectrophotometer, and a cuvette with a path length of 1 cm you measure the absorbance (A275) of Guanosine to be 0.70. C
Anton [14]

Answer : The concentration of guanosine in your sample is, 8.33\times 10^{-5}M

Explanation :

Using Beer-Lambert's law :

A=\epsilon \times C\times l

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C = concentration of solution = ?

l = path length = 1.00 cm

\epsilon = molar absorptivity coefficient guanosine  = 8400M^{-1}cm^{-1}

Now put all the given values in the above formula, we get:

0.70=8400M^{-1}cm^{-1}\times C\times 1.00cm

C=8.33\times 10^{-5}M

Thus, the concentration of guanosine in your sample is, 8.33\times 10^{-5}M

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3 years ago
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