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Andreas93 [3]
3 years ago
6

11. Why are there high and low tides on Earth?

Chemistry
2 answers:
Stella [2.4K]3 years ago
3 0
A is the answerereerrrerrrr
Andrews [41]3 years ago
3 0
A is the answerrrrrrrrr
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The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error
JulijaS [17]

Answer:

1.35\times 10^{-4} M was the concentration of the original solution.

Explanation:

M_1V_1=M_2V_2  (Dilution)

where,

M_1\text{ and }V_1 are molarity and volume of non diluted sample.

M_2\text{ and }V_2 are molarity and volume of diluted sample.

M_1=?

V_1=100.0 \mu L=0.1 mL

(1μL=0.001  mL)

M_2=6.41\times 10^{-6} M

V_2=2.00 mL + 100.0 \mu L=2.00 mL+0.1 mL=2.1 mL

Substituting all values :

M_1\times 0.1 mL=6.41\times 10^{-6} M\times 2.1 mL

M_1=\frac{6.41\times 10^{-6} M\times 2.1 mL}{0.1 mL}=1.35\times 10^{-4} M

1.35\times 10^{-4} M was the concentration of the original solution.

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My favorite student weighs in at 125 pounds. How many<br>kilograms do they weigh?​
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