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what amout of zinc will be required to generate sufficient hydrogen to completely combined with oxygen obtained by complete dec...Asked by lucy
what amout of zinc will be required to generate sufficient hydrogen to completely combined with oxygen obtained by complete decomposition of 30 g of potassium clorate?
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Answered by
DrBob222
2KClO3 ==> 2KCl + 3O2
Convert 30g KClO3 to mols. mols = grams/molar mass.
Using the coefficients in the balanced equation, convert mols KClO3 to mols O2.
2H2 + O2 ==> 2H2O
Using the coefficients in the H2O equation, convert mols O2 from KClO3 reaction to mols H2.
Zn + 2HCl ==> ZnCl2 + H2
Using the coefficient in the Zn equation, convert mols H2 from the H2O equation to mols Zn.
You want to know grams Zn; therefore mols Zn x atomic mass Zn = grams Zn.
Convert 30g KClO3 to mols. mols = grams/molar mass.
Using the coefficients in the balanced equation, convert mols KClO3 to mols O2.
2H2 + O2 ==> 2H2O
Using the coefficients in the H2O equation, convert mols O2 from KClO3 reaction to mols H2.
Zn + 2HCl ==> ZnCl2 + H2
Using the coefficient in the Zn equation, convert mols H2 from the H2O equation to mols Zn.
You want to know grams Zn; therefore mols Zn x atomic mass Zn = grams Zn.
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