When Are an Empirical Formula and a Molecular Formula the Same

question 117

Multiple Choice

When are an empirical formula and a molecular formula the same?

• A) Always
• B) When the mass of the empirical formula unit is equal to the molecular mass
• C) When the mass percentages of all of the elements in the two formulas are the same
• D) Never
• E) When the molecular mass is an integer multiple of formula unit mass

---

Definitions:

Wilcoxon Signed Rank Test

A statistical hypothesis test that doesn't rely on parameter-based assumptions, designed to evaluate whether there's a difference in the population mean ranks of two related samples, matched samples, or repeated measurements on the same sample.

Wilcoxon Signed Rank Test

A statistical analysis method void of parametric requirements, designed to assess whether two associated samples, matched pairs, or recurrent measurements on an individual sample exhibit differences in their mean rank in the population.

Rank Sums

A non-parametric statistical measure used to compare the distributions of two independent samples by ranking all observations together and then summing ranks for observations belonging to each sample.

Standardized Test Statistic

A calculated value used to determine the relative distance of a data point or sample from the mean of a population, expressed in terms of the standard deviation of the population.