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Nataly_w [17]
4 years ago
9

Help me answer all it's for science

Chemistry
2 answers:
Inga [223]4 years ago
6 0
Number four and number five are true 
Nadusha1986 [10]4 years ago
3 0
1. evaporation
2 condensation
3 sublimation
4 t
5 f 
6t
7 f
8 f

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In the laboratory, a student dilutes 18. 9 ml of a 10. 0 m perchloric acid solution to a total volume of 250. 0 ml. what is the
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From the question given above, the following data were obtained:

Volume of stock solution (V1) = 18.9 mL

Molarity of stock solution (M1) = 10 M

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We can obtain the molarity of the diluted solution by using the dilution formula as shown follow:

M1V1 = M2V2

10 × 18.9 = M2 ×250

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M2 = 189 / 250

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Therefore, the molarity of the diluted solution is 0.756 M.

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