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masha68 [24]
3 years ago
10

Is this the correct answer?

Chemistry
1 answer:
Harrizon [31]3 years ago
7 0

Answer: Yes, your answer is correct.

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Answer:

1 and 2

Explanation:

when we r adding chlorine to water

the water is clean

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2 years ago
A man weighing 75 kg takes 5 minutes to reach a height of 5 m when he climbs a staircase. What is his power?
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Explanation:

1) Force = Weight = 75 x 9.8 = 735 N

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3.)Power = Work / Time = 3675 / (5 x 60) = 12.25 W

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Sewage is a liquid waste which causes<br> _________ and ________ pollution.
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3 years ago
How is it that when a salt sample dissolves in water, the delta S for the process is positive?
Bess [88]

Answer:-

Water is highly ordered. In water each oxygen atom is connected to others around it through hydrogen bonding via bridging hydrogen atoms. When a salt like NaCl is dissolved, some of these Hydrogen bonds break.

When a salt like NaCl dissolves in water, the NaCl breaks in to ions Na+ and Cl-.

The water molecules now surround these ions.

The slightly negative oxygen end of water molecule gets near the Na+, while the slightly positive Hydrogen of water molecule gets near the Cl-.

So before salt sample dissolve, the water molecules were highly ordered due to hydrogen bonding. Now after salt dissolve there is a decrease in order and thus an increase in disorder of the water molecules.

Due to increase in disorder, entropy which is a measure of disorder increases. Since entropy increases, delta S for the process is positive.

4 0
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