Analysis of two uranium fluoride compounds yields the following data: Compound I is 75.80% U by mass; compound II has an F-to-U mass ratio that is 1.5 times that of compound I.What is the empirical formula for compound II?

Question

Quizplus · Accepted Answer

Compound I has a formula of UF4 (since 75.80% U by mass corresponds to this formula). The F-to-U mass ratio for UF4 is 4:1. Compound II has an F-to-U mass ratio 1.5 times that of compound I, which means it has a ratio of 6:1, corresponding to UF6.

Analysis of Two Uranium Fluoride Compounds Yields the Following Data