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zvonat [6]
3 years ago
7

What would happen to the results if the plastic wrap was dirty in a water filtration experiment?​

Chemistry
1 answer:
weeeeeb [17]3 years ago
4 0

Answer:

The plastic wrap of the covered cup acts like the atmosphere, and traps the water vapor. In a real cloud, the water vapor cools back into liquid water. In the covered cup, the air can only hold so much vapor, and the vapor condenses back to liquid water forming a “rain cloud” on the plastic wrap.

Explanation:

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25kg

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Which of the following is an example of observational scientific investigation?
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In performing the "STEP TEST" for 3 minutes, what was your score ?
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Household bleach is an aqueous solution of sodium hypochlorite (NaClO), and its concentration is often measured as a percent by
stira [4]

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Explanation:

We have a solution of NaClO with a concentration of 5%w/w:

5% w/w=  5 g NaClO/100 g solution

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Then, we take 6 ml of 0.5% w/w solution and we add 6 ml of dye in a reaction vessel. The total volume of the solution in the reaction vessel is 6 ml + 6 ml= 12 ml, and we are diluting twice the solution because 6 ml/12 ml= 1/2. We can calculate the resulting concentration of the solution after this second dilution as follows:

0.5% w/w x 6 ml/12 ml= 0.5% w/w/2= 0.25%w/w

Finally, we need to convert the concentration from %w/w to M (mol solution/1L solution). For this, we assume a density of the solution close to the density of water (1.00 g/ml) and we use the molecular weight of NaClO (74.44 g/mol):

0.25 g NaClO/100 g solution x 1 mol NaClO/74.44 g x 1.00 g solution/1 ml x 100 ml/0.1 L= 0.033 mol/L

= 0.033 M

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