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How many moles of oxygen will be released when 250.0 grams of KClO3 is thermally decomposed ? 2KClO3 --> 2KCl+3O2<br /><br /> (Must be made to fit into this chart)

How many moles of oxygen will be released when 2500 grams of KClO3 is thermally decomposed 2KClO3 gt 2KCl3O2ltbr gtltbr gt Must be made to fit into this chart class=

Respuesta :

Willchemistry
Molar mass KClO₃ = 122.5 g/mol and O₂ = 32.0 g/mol

2 KClO₃ ----------------> 2 KCl + 3 O₂

2 * 122.5 g KClO₃ ---------> 3 * 32 g O₂
250.0 g KClO₃ ------------> ?

mass of O₂ = 250.0 * 3 * 32 / 2 * 122.5

mass of O₂ = 24000 / 245

mass of O₂ = 97.959 g

number of moles O₂ :

1 mole --------- 32.0 g
? mole -------- 97.959 g

moles = 97.959 * 1 / 32.0

= 97.959 / 32.0

= 3.061 moles of O₂

hope this helps!

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