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Sonbull [250]
3 years ago
11

When 86.5 g of calcium chlorate decomposes into calcium chloride and oxygen, how many grams of oxygen are produced? Ca(ClO3)2 →

CaCl2 + O2
Chemistry
1 answer:
natita [175]3 years ago
8 0

Answer:

40.1 g

Explanation:

The <em>balanced equation</em> is:

  • Ca(ClO₃)₂ → CaCl₂ + 3O₂

First we <u>convert 86.5 g of calcium chlorate into moles</u>, using its<em> molar mass</em>:

  • 86.5 g Ca(ClO₃)₂ ÷ 206.98 g/mol = 0.418 mol Ca(ClO₃)₂

Then we <u>convert Ca(ClO₃)₂ moles into O₂ moles</u>, using <em>the stoichiometric coefficients of the balanced reaction</em>:

  • 0.418 mol Ca(ClO₃)₂ * \frac{3molO_2}{1molCa(ClO_3)_2} = 1.254 mol O₂

Finally we <u>convert O₂ moles into grams</u>:

  • 1.25 mol O₂ * 32 g/mol = 40.1 g O₂
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