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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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Calculate the ph of sweater which has a hydrogen ion concentration of 1 times 10 to the power of 8
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Answer:

The pH of the sweater containing Hydrogen ion concentration

[H^{+}]=1\times 10^{-8} is

<u>8</u>

<u></u>

Explanation:

pH = It is the negative logarithm of activity (concentration) of hydrogen ions.

pH = -log([H+])

Now, In the question the concentration of [H+] ions is :

[H^{+}]=1\times 10^{-8}

pH = -log(1\times 10^{-8})

use the relation:

log(10^{-a})=a

pH= -(-8)

pH = 8

Note : <em><u> 1 times 10 to the power of 8 must be" 1 times 10 to the power of -8"</u></em>

If the concentration is

[H^{+}]=1\times 10^{8}

Then pH = -8 , which is not possible . So in that  case the pH calculation is by other method

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Why the partial charge on H in HF is more positive than the partial charge on H in HBr
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Because fluorine has a higher electronegativity
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A small piece of Cr metal reacts with dilute HNO3 to form H2 (g), which is collected over water at 18 C in a large flask. The to
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Complete Question

The complete question is shown on the first uploaded image

Answer:

The partial pressure is P_p= 737.5 mm \ of  \ Hg

Explanation:

The Partial pressure of H_2 is mathematically represented as

           P_p = P_T -P_w

Where P_T is the total pressure of water with a value of 15.5 mm of Hg

           P_w is the partial pressure of water with a value 753 mm of Hg

Now substituting values

          P_p = 753-15.5

               P_p= 737.5 mm \ of  \ Hg

       

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Answer:

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Explanation:

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It is not a molecule because a molecule is a group of atoms, or a compound, what is shown is a singular atom.

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a chemist uses hot hydrogen gas to convert chromium (iii) oxide to pure chromium. how many grams of hydrogen are needed to produ
MA_775_DIABLO [31]

Answer:

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