3 years ago

Witch best describes the function of a chloroplast?

Biology

2 answers:

worty [1.4K]3 years ago

6 0

Answer:

chlorophast allows plants to capture the energy of the sun.

Explanation:

Serggg [28]3 years ago

4 0

Answer:

Chlorophast allows plants to capture the energy of the sun.

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Which of the following factors has the greatest effect on blood pressure?

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3 years ago

Is it necessary for coffee shops to remind their costumers that their coffee is hot

horsena [70]

Yes, actually.

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A sample of unknown concentration is diluted by placing 0.2 mL into 9.8 mL of buffer and then 3 mL is placed into a standard 1x1

Lina20 [59]

Answer:

The answer is " $4.875 \ \frac{mol}{l}\\$ ".

Explanation:

The molar absorptivity value is= 12.3 $\frac {L}{mol \times cm}$

path length of cell = 1 $\ cm$

Absorbance = 1.2

Using the beer's lambert law:

$A = \varepsilon \ cl\ \ \ \ \ \ \ _{where} \\\\c= \frac{A}{ \varepsilon l } \\\\$

$= \frac{1.2}{12.3 \times 1}\\\\= 0.0975 \ \frac{mol}{L}\\$

Claculating the concentration of the solution after dilution: $(m_2)= 0.0975 \ \ \frac{mol}{L}$

find out the dilution value before concentration :

The volume taken by the dilution: $(V_1) = 0.2\ ml$

The final volume after dilution:

$(V_2) = 9.8+0.2\\$

$= 10 \ ml$

Formula:

$\bold{M_1 \times V_1 = M_2 \times V_2} \\\\ M_1= \frac{M_2 \times V_2 }{V_1}\\\\$

$= \frac{ 0.0975 \times 10 }{0.2}\\\\= \frac{ 0.975 }{0.2}\\\\ = 4.875 \ \frac{mol}{l}\\$

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