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Tatiana [17]
3 years ago
5

Help please !!!!!!!!!

Chemistry
1 answer:
Sveta_85 [38]3 years ago
6 0

4 Al(s) + 3 O2(g) ---> 2 Al2O3(s)  

Use dimensional analysis and equation coefficients to convert moles of Al2O3 to moles of O2, to grams of O2:  

[(1.00 mol Al2O3)/1][(3 mol O2)/(2 mol Al2O3)][(31.998 g O2)/(1 mol O2)] =

<em>48.0 g of O2</em>

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Explanation:

For the first part,

 Reaction equation:

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Given:

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Unknown:

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Solution:

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        6 moles of NH₃ will be produced from \frac{6}{2}  mole of N₂

                                                                      = 3moles of N₂

The number of moles of N₂ is 3 moles

ii.

Given parameters:

Number of moles of sulfur = 2.4moles

Molar mass of sulfur  = 32.07g/mol

Unknown:

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The number of moles of any substance can be found using the expression below;

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Insert the parameters and solve;

    Mass of sulfur  = 2.4 x 32.07  = 76.97g

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