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ahrayia [7]
3 years ago
10

When the south magnetic pole of a magnet is placed near the south pole of another magnet, the two magnets will _____ one another

.
A. repel
B. attract
C. weaken
D. strengthen
Chemistry
1 answer:
Ivanshal [37]3 years ago
8 0

Answer:

A. Repel

Explanation:

A magnet comprises of north and south poles.

When the south magnetic poles of two magnets are brought together, the magnets will repel because they are like charges and like

charges repel each other.

But when the north magnetic pole of one magnet is brought together with the South Pole of another magnet, both magnets will attract because they have different charges + and - . Positive and negative charges attract .

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The partial pressure of O2 in air at sea level is 0.21atm. The solubility of O2 in water at 20∘C, with 1 atm O2 pressure is 1.38
adell [148]

Answer:

1.21x10^{-3} M

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Henry's law relational the partial pressure and the concentration of a gas, which is its solubility. So, at the sea level, the total pressure of the air is 1 atm, and the partial pressure of O2 is 0.21 atm. So 21% of the air is O2.

Partial pressure = Henry's constant x molar concentration

0.21 = Hx1.38x10^{-3}

H = \frac{0.21}{1.38x10^{-3} }

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3 years ago
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