Print Calculator Periodic Table uestion 1 of 5 Incorrect Incorrect K incorrect I

Question

Print Calculator Periodic Table uestion 1 of 5 Incorrect Incorrect K incorrect Incorrect Incorrect A Sapling Learning a certain temperature, a 22.5-L contains holds four gases in equilibrium. Their masses are: 3.5 g sos, 4.6 g SO2, 13.2 g N2, and 0.98 g N20. What is the value of the equilibrium constant at this temperature for the reaction of SO2 with N20 to form SO3 and N2 (balanced with lowest whole-number coefficients)? There is a hint availablel divider bar again to hide the hint. o Previous 8 Give up is view Solution 2 check Answer Next HExit

Explanation / Answer

Answer:

Kc = conc. products/ conc. reactants
Check their mole ratios:
Equation: SO2(g) + N2O(g) SO3(g) + N2(g)
All 1:1 ratios, so
Kc = [SO3][N2]/[SO2][N2O]

Moles:
4.6g SO2 x 1 mol SO2/ 64.066g = 0.0718 moles SO2
0.98g N2O x 1 mol N2O/ 44.0g = 0.0223 moles N2O
3.5g SO3 x 1 mol SO3/ 80.1g = 0.0437 moles SO3
13.2g N2 x 1 mol N2/ 28.0g = 0.471 moles N2

Concentrations:
0.0718 mol/ 22L = 3.26 x 10^-3 M SO2
0.0223 mol/ 22L = 1.01 x 10^-3 M N2O
0.0437 mol/ 22L = 1.99 x 10^-3 M SO3
0.471 mol/ 22L = 2.14 x 10^-2 M N2
Kc = (1.99x10^-3)(2.14x10^-2)/(1.01x10^-3)(3.26X10-3)
= 30

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