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Thepotemich [5.8K]
3 years ago
13

10g of sugar is dissolved by water to make 200g of solution of sugar. What is the percent by mass of the solution?​

Chemistry
1 answer:
Scorpion4ik [409]3 years ago
7 0

Explanation:

In sugar solution 200 g has sugar 10 g

In sugar solution 100 g has sugar 10/200 × 100

= 5 %w/w

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Given 200ul of a 0.5mg/ml stock solution of BSA, how much do you pipet into a test tube so that you are adding 5ug of BSA to the
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<u>Answer: </u>10\mu L of volume needs to be pipetted out in the test tube.

<u>Explanation:</u>

We are given:

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Volume of stock solution = 200\mu L=0.2mL    (Conversion factor: 1mL=1000\mu L

It is also given that for the mass of BSA is 0.5 g, the volume used up is 1 mL

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Hence, 10\mu L of volume needs to be pipetted out in the test tube.

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