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3 years ago

Please help!!! Stoich Question

Chemistry

1 answer:

Greeley [361]3 years ago

5 0

Answer:

4KO₂ + 2CO₂ -> 2K₂CO₃ + 3O₂

Step 1: Find the moles of O₂.

n(O₂) = mass/ Mr.

n(O₂) = 100 / 32 = 3.125 mol

Step 2: Find the ratio between KO₂ and O₂.

KO₂ : O₂

4 : 3

4/3 : 1

(4*3125)/3 : 3.125

=4.167 mol of KO₂

Thus now we know, to produce 100 g of O₂, we need 4.167mol of KO₂

Step 3: Find the mass of KO₂:

mass = mol * Mr. (KO₂)

Mass = 4.167* 71.1

Mass = 296.25 g

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