What is the chemical name for a compound with the formula $\mathrm{Ba}_3 \mathrm{~N}_2$ ?

What products would you expect to obtain if each of the following terpenes were subjected to ozonolysis and subsequent treatment with dimethyl sulfide? (a) Myrcene (b) Limonene (c) $\alpha$-Farnesene (d) Geraniol (e) Squalene

Many water treatment facilities supplement the natural fluoride concentration with hydrofluosilicic acid in order to reach a target concentration of fluoride in drinking water. Certain levels are thought to enhance dental health, but very high concentrations can be dangerous. Suppose that one such treatment plant targets .75 milligram per liter (mg/L) for its, water. The plant tests 25 samples each day to determine whether the median level differs from the target. a. Set up the null and alternative hypotheses. b. Set up the teststatisticand rejectionregion, using $\alpha=.10$. c. Explain the implication of a Type I error in the context of this application. A Type II error. d. Suppose that one day's samples result in 18 values that exceed .75 mg/L. Conduct the test and state the appropriate conclusion in the context of this application. e. When it was suggested to the plant's supervisor that a t-test should be used to conduct the daily test, she replied that the probability distribution of the fluoride concentrations was "heavily skewed to the right." Show graphically what she meant by this, and explain why this is a reason to prefer the sign test to the t-test.

The median length of stay for male substance-abuse outpatient treatment completers is 105 days. The following data represent the length of stays for a random sample of female substance-abuse outpatient treatment completers.

$$\begin{array}{cccccc}\hline 117 & {111} & {81} & {110} & {103} & {94} \\ \hline 92 & {91} & {116} & {108} & {98} & {84} \\ \hline\end{array}$$

Using the Wilcoxon signed-ranks test at the $\alpha$=0.05 level of significance, does the median length of stay seem different for males and females?

New York legally emancipated enslaved people shortly after Ruggles arrived in the city. What does his treatment tell us about the realities of freedom for Black Americans in New York at this time?

Check your understanding of sexual paraphilic disorders by matching the scenarios with the correct label: (a) exhibitionistic disorder, (b) voyeuristic disorder, (c) fetishistic disorder, or (d) sexual masochism disorder. Peeping Tom loves to look through Susie's bedroom window and watch her undress. He gets extremely excited as she disrobes. He is practicing __________ .

The Fulwood Neurology Clinic treats patients with varied diseases and disorders of the nervous system. Are you familiar enough with their terminology and symptoms to match the correct disease or disorder with the appropriate statement for each patient? Select the correct choice.

Patient complains of intermittent, shooting pain in the area of the face and head: a. trigeminal neuralgia b. peripheral neuropathy c. neuritis

Treatment of biphenyl with a mixture of nitric acid and sulfuric acid gave two principal products both having the molecular formula $\mathrm{C}_{12} \mathrm{H}_{9} \mathrm{NO}_{2}$. What are these two products?

Why do different isotopes of the same element have the same chemical properties?

The boxes below each show a step to explain how genetic disorders have a molecular basis. Number them so that the steps are in the correct order.

$$\begin{matrix} \text{A change in phenotype results.} & \text{A gene's DNA sequence changes.} & \text{The amino acid sequence that alters a protein changes.}\\ \text{\_\_\_\_\_} & \text{\_\_\_\_\_} & \text{\_\_\_\_\_} \\ \end{matrix}$$

Consider a completely randomized design with k treatments. Assume that all pairwise comparisons of treatment means are to be made with the use of a multiplecomparison procedure. Determine the total number of pairwise comparisons for the following values of k :

$$k = 100$$

Seymour Benzer and Ernst Freese compared spontaneous and $5$-bromouracil-induced mutants in the rII gene of the bacteriophage T$4$; the mutagen increased the mutation rate (rII$^{+}$ $\rarr$ rII) several hundred times above the spontaneous mutation rate. Almost all ($98$ percent) of the $5$-bromouracil-induced mutants could be induced to revert to wild-type (rII $\rarr$ rII$^{+}$) by $5$-bromouracil treatment, but only $14$ percent of the spontaneous mutants could be induced to revert to wild-type by this treatment. Discuss the reason for this result.

For each of the following elements, give the chemical symbol and atomic number.

d. strontium

Write a balanced chemical equation for the standard formation reaction of solid sodium carbonate.