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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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3. How many moles of HCl are present in 3.70 L of a 2.33 M HCl solution?
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Answer:

8.6 mol

Explanation:

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4 0
3 years ago
What is the barometric pressure exerted in pascals (Pa) of a column of decane (density = 0.7300 g/cm3) 636.2 mm in height?
BartSMP [9]
<h3>Answer:</h3>

4551.37 Pascals

<h3>Explanation:</h3>

The pressure refers to the force exerted by a substance per unit area.

The pressure is liquid is calculated by;

P = height × density × gravitational acceleration

In this case;

Height = 636.2 mm

Density = 0.7300 g/cm³

g = 9.8 N/kg

We need to convert mm to m and g/cm³ to kg/m³

Therefore;

Height = 636.2 mm ÷1000

           = 0.6362 m

Density = 0.73 g/cm³ × 1000 kg/m³

             = 730 kg/m³

Then, we can calculate the pressure;

Pressure = 0.6362 m × 730 kg/m³ × 9.8 N/kg

              = 4551.3748 pascals

               = 4551.37 Pascals

Therefore, the pressure of the column of decane is 4551.37 Pascals

5 0
3 years ago
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