Question

Question #377d6

Answer 1

`=43.01L`

Explanation:

1. Write the given balanced equation
   `2KClO_3->2KCl+3O_2`
2. Given the mass of `O_2`, per convention, change it to `"mole"(eta)` through the formula:
   `eta=("mass"(m))/("Molar mass"(M))`
   `eta=(34cancel(gO_2))/((32cancel(gO_2))/(molO_2))`
   `eta=1.0625molO_2`
3. Now, find the volume O_2 produced with the given values at standard pressure (1 atm.) using the ideal gas formula. The chosen gas constant `R=(0.0821L*atm)/(mol*K)`.
   `PV=etaRT`
   `V=(etaRT)/(P)`
   `V=((1,0625cancel(mol))((0.0821L*cancel(atm))/cancel((mol*K)))(220+273)cancel(K))/(1cancel(atm))`
   `V=43.01L`