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Dmitry [639]
3 years ago
11

Which of these methods is best for separating sediment from a water mixture.

Chemistry
1 answer:
allochka39001 [22]3 years ago
8 0

Answer:

A

Explanation:

For example salt would stay as a crystal

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Lower fertility and longer lifespans steadily increased the potential labor force relative to the total population
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Combining a base and an acid forms
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Base + acid = salt + water

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3 years ago
vaporized at 100°C and 1 atmosphere pressure. Assuming ideal gas 1 g mole of water is behavior calculate the work done and compa
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Answer:

q = 40.57 kJ; w = -3.10 kJ; strong H-bonds must be broken.

Explanation:

1. Heat absorbed

q = nΔH = 1 mol × (40.57 kJ/1 mol) = 40.57 kJ

2. Change in volume

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3. Work done

w = -pΔV = - 1 atm × 30.60 L = -30.60 L·atm

w = -30.60 L·atm × (101.325 J/1 L·atm) = -3100 J = -3.10 kJ

4. Why the difference?

Every gas does 3.10 kJ of work when it expands at 100 °C and 1 atm.

The difference is in the heat of vaporization. Water molecules are strongly hydrogen bonded to each other, so it takes a large amount of energy to convert water from the liquid phase to the vapour phase.

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Which set of numbers gives the correct possible values of l for n = 3?
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0 1 2 3
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