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Elena-2011 [213]
2 years ago
11

2. Does the aluminum sample (the can) contain more than, (less than or exactly one mole of aluminum? Support answer with calcula

tion.
Chemistry
1 answer:
mrs_skeptik [129]2 years ago
6 0

Answer:

than, (less than or exactly one mole

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The molar mass of HgO is 216.59 g/mol. The molar mass of O2 is 32.00 g/mol. How many moles of HgO are needed to produce 250.0 g
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A reaction in which Oxygen (O₂) is produced from Mercury Oxide (HgO) would be a decomposition reaction.
           2HgO    →    2Hg    +    O₂

If 250g of O₂ is needed to be produced,
then the moles of oxygen needed to be produced = 250g  ÷  32 g/mol
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Now, the mole ratio of Oxygen to Mercury Oxide is  1  :  2
∴ if the moles of oxygen =  7.8125 mol
then the moles of mercury oxide = 7.8125 mol × 2
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Thus the number moles of HgO needed to produce 250.0 g of O₂ is 15.625 mol
 
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