Respuesta :
7.88 grams is the mass of oxygen gas results from the decomposition of 17.00 g of calcium chlorate.
Explanation:
Data given:
mass of calcium chlorate = 17 grams
atomic mass of calcium chlorate = 206.98 grams/mole
mass of oxygen formed =?
atomic mass of oxygen gas = 32 grams/mole
balance chemical reaction:
Ca(Cl[tex]O_{3}[/tex])[tex]_{2}[/tex] ⇒[tex]CaCl_{2}[/tex] + 3[tex]O_{2}[/tex]
Number of moles = [tex]\frac{mass}{atomic mass of 1 mole}[/tex]
putting the values in the equation:
number of moles = [tex]\frac{17}{206.98}[/tex]
number of moles of calcium chlorate = 0.0821 moles
1 mole of calcium chlorate decomposes to release 3 mole of oxygen
0.0821 moles will release x moles of oxygen gas
[tex]\frac{3}{1}[/tex]=[tex]\frac{x}{0.0821}[/tex]
x = 0.246 moles
mass = atomic mass x number of moles
mass = 0.246 x 32
mass = 7.88
7.88 grams of oxygen produced from decomposition of 17 grams calcium chlorate
