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MArishka [77]
3 years ago
13

Which is a pure substance?

Chemistry
1 answer:
aliya0001 [1]3 years ago
5 0

Which is a pure substance?

<u>A faceted diamond.</u>

<u></u>

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For the reaction of ammonia (NH3) with oxygen (O2) to produce water and nitric oxide (NO), how many moles of water are produced
asambeis [7]

Answer:

3.3 moles of H₂O.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

4NH₃ + 5O₂ —> 6H₂O + 4NO

From the balanced equation above,

4 moles of NH₃ reacted to produce 6 moles of H₂O.

Finally, we shall determine the number of mole of H₂O produced by the reaction of 2.2 moles of NH₃. This can be obtained as follow :

From the balanced equation above,

4 moles of NH₃ reacted to produce 6 moles of H₂O.

Therefore, 2.2 moles of NH₃ will react to produce = (2.2 × 6)/4 = 3.3 moles of H₂O.

Thus, 3.3 moles of H₂O were obtained from the reaction.

7 0
3 years ago
Is this correct im so confused.
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Answer:

<em>the last option!!!!</em>

Explanation:

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The standard enthalpy of formation of Ca2+ (g) (∆H = 1934 kJ/mol)
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Answer:

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Explanation:

The process of ionization to produce cations is endothermic. For formation of Ca⁺² two ionization steps need be illustrated as follows...

1st ionization step: Ca° + 590Kj => Ca⁺ + e⁻

2nd ionization step: Ca⁺ + 1151Kj => Ca⁺² + e⁻

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Net Ionization Rxn: Ca° + 1741Kj => Ca⁺² + 2e⁻

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