14. Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K. Cylinder A contains HCN, cylinder B contains NO2, and cylinder C contains O3. According to the kinetic molecular theory, which gas has the highest average kinetic energy?
(A)HCN .
(B) NO2
(C)O3
(D) All have identical average kinetic energies
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