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Korolek [52]
3 years ago
7

Magnesium metal put into acid? Physical or chemical change

Chemistry
2 answers:
e-lub [12.9K]3 years ago
4 0
Physical. The Magnesium is physically put into acid.
Angelina_Jolie [31]3 years ago
4 0
The answer is Physical Change. Magnesium metal put into acid it is called physical change. Physical Change is a substance it does not have a change, or arrangement of molecules it also be change. Hope it helped you!
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6) (a) Calculate the absorbance of the solution if its concentration is 0.0278 M and its molar extinction coefficient is 35.9 L/
Anvisha [2.4K]

Answer:

6) (a) 0.499; (b) 31.7 %

7) 0.15

Explanation:

6) (a) Absorbance

Beer's Law is

A = \epsilon cl\\A = \text{35.9 L&\cdot$mol$^{-1}$cm$^{-1}$} $\times$ 0.0278 mol$\cdot$L$^{-1} \times $ 0.5 cm = \mathbf{0.499}

(b) Percent transmission

A = \log {\left (\dfrac{1}{T}}\right)}\\\\\%T = 100T\\\\T = \dfrac{\%T}{100}\\\\\dfrac{1}{T} = \dfrac{100 }{\%T}\\\\A = \log \left(\dfrac{100 }{\%T} \right ) = 2 - \log \%T\\\\0.499 = 2 - \log \%T\\\\\log \%T = 2 - 0.499 = 1.501\\\\\%T = 10^{1.501} = \mathbf{31.7}

7) Absorbance

A = \log \left (\dfrac{I_{0}}{I} \right ) = \log \left (\dfrac{I_{0}}{0.70I_{0}} \right ) = \log \left (\dfrac{1}{0.70} \right ) = -\log(0.70) = \mathbf{0.15}}

8 0
3 years ago
A colloid can be detected by using the _________ effect. mohs tyndall faraday brownian
Sliva [168]
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3 0
3 years ago
Read 2 more answers
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svetoff [14.1K]

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3 years ago
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Explanation:

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