Question

Biology

Posted about 2 months ago

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If a DNA solution has a concentration of $20 \mathrm{mg} / \mathrm{ml}, 500 \backslash \mathrm{mu} \mathrm{g}$ of DNA would be contained in how many $\mathrm{ml} ?$
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Answer from Sia

Posted about 2 months ago

Answer

0.025 ml

Solution

a

Given: The concentration of the DNA solution is $20 \, \mathrm{mg/ml}$

b

Convert $500 \, \mu g$ to $mg$: $500 \, \mu g = 0.5 \, mg$

c

Use the formula: $\text{Volume} = \frac{\text{Mass}}{\text{Concentration}}$

d

Substitute the values: $\text{Volume} = \frac{0.5 \, mg}{20 \, mg/ml} = 0.025 \, ml$

Key Concept

Concentration and volume relationship

Explanation

To find the volume of a solution needed to obtain a specific mass of solute, you can use the formula $\text{Volume} = \frac{\text{Mass}}{\text{Concentration}}$. In this case, converting the mass from micrograms to milligrams and then applying the formula gives the required volume.

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