Consider the reaction 2 KClO 3 ( s ) ? 2 KCl( s ) + 3 O 2 ( g ) How many grams o

Question

Consider the reaction

2 KClO3(s) ? 2 KCl(s) + 3 O2(g)

How many grams of oxygen are produced from the complete reaction of 31.1 g of KClO3?


Select a response:


15.3 g
13.3 g
12.2 g
14.1 g
10.8 g Consider the reaction

2 KClO3(s) ? 2 KCl(s) + 3 O2(g)

How many grams of oxygen are produced from the complete reaction of 31.1 g of KClO3?


Select a response:

Consider the reaction

2 KClO3(s) ? 2 KCl(s) + 3 O2(g)

How many grams of oxygen are produced from the complete reaction of 31.1 g of KClO3?


Select a response:

15.3 g 13.3 g 12.2 g 14.1 g 10.8 g
15.3 g
13.3 g
12.2 g
14.1 g
10.8 g

Explanation / Answer

2 KClO3(s) ? 2 KCl(s) + 3 O2(g)

Molar mass of Kclo3 = 122.55 g/mol

2 moles kclo3 => 3 moles o2

1moles => 3/2 moles of o2

n = 31.1/ 122.5 = 0.258 moles

=> 0.258 moles =====> 0.258*3/2 moes of o2

=>>>>>>>>>>>>>>>>> = 0.380 moles of o2

molar mass of o2 = 32g/mol

=> mass of 0.38 mole = 32* 0.38 = 12.18 g----------> answer OPTION C => 12.2 g

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