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Elan Coil [88]
3 years ago
9

Please help and explain how to do it need the answer asap, please.

Chemistry
1 answer:
dimulka [17.4K]3 years ago
8 0

Answer:

45 and 20 c2 Or4

Explanation:

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animal and plant are the example of eukaryotes

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Which best describes how energy flows through an ecosystem?
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Number 3

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For the following reaction, 53.7 grams of iron(III) oxide are allowed to react with 22.8 grams of aluminum. iron(III) oxide (s)
ZanzabumX [31]

Answer:

34.23 grams is the maximum amount of aluminum oxide that can be formed.

Iron (III) oxide is a limiting reagent i.e Fe_2O_3.

4.6764 grams is the amount of the aluminum which remains after the reaction is complete

Explanation:

iron(III) oxide (s) + aluminum (s) → aluminum oxide (s) + iron (s)

Fe2O_3(s)+2Al(s)\rightarrow Al_2O_3(s)+2Fe(s)

Moles of  iron(III) oxide : \frac{53.7 g}{160 g/mol}=0.3356 mol

Moles of aluminium : \frac{22.8 g}{27 g/mol}=0.8444 mol

According to recation, 1 mole of iron(III) oxide reacts with 2 moles of aluminum.

Then 0.3356 moles of iron(III) oxide will react with:

\frac{2}{1}\times 0.3356 mol=0.6712 mol of aluminum.

As we can see that moles of iron(III) are in limiting amount.Hence iron(III) oxide is a limiting reagent i.e Fe_2O_3 and aluminum in the an excessive reagent.

Amount of aluminum oxide will depend upon moles of limiting reagent that is iron(III) oxide.

According to reaction , 1 mole iron(III) oxide gives 1 moles of aluminum oxide.

Then 0.3356 moles will give:

\frac{1}{1}\times 0.3356 mol=0.3356 mol of aluminum oxide

Mass of 0.3356 moles of aluminum oxide:

0.3356 mol × 102 g/mol = 34.23 g

34.23 grams is the maximum amount of aluminum oxide that can be formed.

Moles of excessive reagent left = 0.8444 mol - 0.6712 mol = 0.1732 mol

Mass of 0.1732 moles of aluminum :

0.1732 mol × 27 g/mol = 4.6764 g

4.6764 grams is the amount of the aluminum which remains after the reaction is complete

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3 years ago
Hector has just learned that Earth is in the Milky Way galaxy. He is curious to know whether the Milky Way galaxy is unique in t
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c

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all universes in the milky way are unique in planets and compositions

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2 years ago
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PLEASEEEEEEEEEE HELP!!!!!!!!
ki77a [65]

Answer:

The total energy of the system is maintained as energy is transformed.

Explanation:

The total energy of the system is conserved.

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