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Westkost [7]
2 years ago
6

Could someone please HELP ME

Chemistry
1 answer:
scoundrel [369]2 years ago
8 0

a) chemical energy

b) by electricity

c)

(i) Light

(ii) thermal transfer

<em>By </em><em>Benjemin</em>

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inysia [295]

Answer:

D

Explanation:

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4 0
3 years ago
A sample of pure NH4HS is placed in a sealed 2.0-L container and heated to 550 K at which the equilibrium constant is 3.5 x 10-3
Zolol [24]

Answer:

The mass of NH_{3} in the container is 2.074 gram

Explanation:

Given:

Volume of NH_{4} HS    V = 2 lit

Equilibrium constant k _{eq} = 3.5 \times 10^{-3}

The reaction in which NH_{3} is produced

  NH_{4} HS ⇄ NH_{3} + H_{2}S

Here equal moles of NH_{3} and H_{2}S is formed.

From the formula of equilibrium constant,

  k_{eq} = (NH_{3})(H_{2}S )

   x^{2} = 3.5 \times 10^{-3}

     x = 0.061 M

Above value shows,

   NH_{3} = 0.061 \frac{moles}{L}

So in 2 L no. moles of NH_{3} = 0.061 \times 2 = 0.122 moles.

So mass of 0.122 mole of NH_{3} is = 0.122 \times 17 = 2.074 g

Therefore, the mass of NH_{3} in the container is 2.074 gram

8 0
3 years ago
Read the sentence from the introduction [paragraphs 1-3].
ss7ja [257]

Answer: the answer is B

Explanation:

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How can one describe the bond between the two atoms of hydrogen to the one atom of oxygen within a molecule of water (h2o)?
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There are O-H bonds in H2O. They have the intramolecular force of polar covalent bond.

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2 years ago
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