How much faster does ⁷⁹Br₂ effuse than ⁸¹Br₂? A)0.975 times as fast B)1.025 times as fast C)1.013 times as fast D)0.988 times as fast E)Cannot be determined

Question

Quizplus · Accepted Answer

The rate of effusion of a gas is inversely proportional to the square root of its molar mass (Graham's law of effusion). The given formulas represent isotopes of an element with different atomic masses. The first formula has an atomic mass of 179 and the second has an atomic mass of 181. The rate of effusion can be calculated using the square root of the inverse ratio of their masses. Thus, the rate of effusion for the first isotope compared to the second is sqrt(181/179) = 1.013 times as fast.

How Much Faster Does 79Br2 Effuse Than 81Br2

How Much Faster Does ⁷⁹Br₂ Effuse Than ⁸¹Br₂