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Annette [7]
4 years ago
10

Assign oxidation numbers to each element in this compound. NO N = O =

Chemistry
1 answer:
Andrei [34K]4 years ago
7 0
<h3><u>Answer;</u></h3>

Oxidation number of O =-2 and N= +2

<h3><u>Explanation;</u></h3>
  • The oxidation number of an atom is the charge that atom would have if the compound was composed of ions.
  • NO is a gas whose oxidation number is zero.
  • The oxidation number of oxygen is almost always -2
  • Therefore to find the oxidation number of Nitrogen;

<em>-2 + x = 0</em>

<em>x = +2 </em>

<em>The oxidation number of N is + while that of O is -2 </em>

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Answer:

0.342 m

Explanation:

From the question given above, the following data were obtained:

Mass of NaBr = 14.57 g

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Molar mass of NaBr = 102.89 g/mol

Molality of NaBr =?

Next, we shall determine the number of mole in 14.57 g of NaBr. This can be obtained as follow:

Mass of NaBr = 14.57 g

Molar mass of NaBr = 102.89 g/mol

Mole of NaBr =?

Mole = mass / molar mass

Mole of NaBr = 14.57 / 102.89

Mole of NaBr = 0.142 mole

Next, we shall convert 415 g of water to kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

415 g = 415 g × 1 Kg / 1000 g

415 g = 0.415 Kg

Thus, 415 g is equivalent to 0.415 Kg.

Finally, we shall determine Molality of the solution as follow:

Mole of NaBr = 0.142 mole

Mass of water = 0.415 Kg

Molality of NaBr =?

Molality = mole / mass of water in Kg

Molality of NaBr = 0.142 / 0.415

Molality of NaBr = 0.342 m

Therefore, the molality of NaBr solution is 0.342 m.

5 0
3 years ago
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Why might electricity and magnetism be effective methods of collecting indirect evidence about atoms?
maks197457 [2]

Answer:

Atoms are composed of electrically charged particles and moving electric charges possess an associated magnetic field.

Explanation:

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