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miskamm [114]
3 years ago
15

During the drying cycle, clothes soaked in liquid PERC at 300 K at 1 atm are tumbled in a stream of warm air at 330 K at 1 atm t

hat circulates through the basket causing the liquid to evaporate. How do the kinetic energy (K) and potential energy (Ep) of PERC molecules in the liquid change during the evaporation?
A. K decreases; Ep increases.
B. K increases; Ep increases.
C. K remains constant; Ep decreases.
D. K remains constant; Ep increases.
Chemistry
1 answer:
djyliett [7]3 years ago
6 0
The answer is option A
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The extend of sewage treatment required mostly depends on the (A) Control of suspended solid (B) BOD of the sewage (C) Both a an
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<h3>What is Inorganic matter?</h3>

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8 0
1 year ago
A chemist must dilute of aqueous sodium carbonate solution until the concentration falls to . He'll do this by adding distilled
Mademuasel [1]

The question is incomplete, complete question is :

A chemist must dilute 73.9 mL of 400 mM aqueous sodium carbonate  solution until the concentration falls to 125 mM . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits.

Answer:

The final volume of the solution will be 0.236 L.

Explanation:

Concentration of sodium carbonate solution before dilution =M_1= 400 mM

Volume of sodium carbonate solution before dilution = V_1=73.9 mL

Concentration of sodium carbonate solution after dilution =M_2= 125 mM

Volume of sodium carbonate solution after dilution = V_2=?

Dilution equation is given by:

M_1V_1=M_2V_2

V_2=\frac{M_1V_1}{M_2}

V_2=\frac{400 mM\times 73.9 mL}{125 mM}= 236.48 mL\approx 236 mL

1 mL = 0.001 L

236 mL = 0.236 L

The final volume of the solution will be 0.236 L.

3 0
3 years ago
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