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stich3 [128]
3 years ago
12

Magnesium oxide does not readily decompose into magnesium and oxygen. The reaction is shown below. MgO(s) + 601.7 kJ mc017-1.jpg

Mg(s) + ½O2(g) Which factor plays the most important role in allowing this reaction to occur? temperature concentration pressure surface area Mark this and return
Chemistry
2 answers:
Sophie [7]3 years ago
7 0

Answer is: temperature.

Balanced chemical reaction: MgO(s) + heat → Mg(s) + 1/2O₂(g).

This is endothermic reaction (ΔH > 0, chemical reaction that absorbs more energy than it releases). In endothermic reactions heat is reactant.

Because magnesium oxide (MgO) is in solid state, concentration, pressure and surfuce does not play the most important role in allowing this reaction to occur.

galben [10]3 years ago
5 0
TEMPERATURE IS THE ANSWER 
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First we need to covert the pound in grams.

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Now we look at the chemical reaction where hydrogen (H₂) reacts with nitrogen (N₂) to produce ammonia (NH₃):

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number of moles = mass / molar weight

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Now taking in account the chemical reaction, we formulate the following reasoning:

if         3 moles of hydrogen produce 2 moles of ammonia

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Y = (3 × 10.192) / 2 = 15.288 moles of hydrogen

mass = number of moles × molar weight

mass of hydrogen = 15.288 × 2 = 30.576 g

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