A 1.25 M solution of the weak acid HA is 9.2 % dissociated. What is the pH of the solution?

Classify each compound as an Arrhenius acid or an Arrhenius base. $Mg(OH)_2$

Changing a single amino acid in a protein consisting of 433 amino acids would

Write balanced equations to represent the reaction of aluminium oxide with aqueous sulfuric acid

Suggest a reasonable mechanism for the conversion of a nitrile (RCN) to the corresponding amide in aqueous acid.

Accountants at Warner Co. use worksheets similar to the one shown in Exhibit 5-13, on page 209. In the company's most current year-end worksheet, the amounts transferred from the adjusted trial balance columns to the balance sheet and income statement columns are as follows:

$$\begin{array}{|cc} \text { Total amount transferred to the credit column of the balance sheet } & \cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots \$ 410,000 \\ \text {Total amount transferred to the debit column of the balance sheet } & \cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots 540,000 \\ \text { Total amount transferred to the credit column of the income statement. } & \cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots\cdots 380,000\\ \end{array}$$

a. What was the company’s net income for the year?

Construct graphs of the function $f(x)=x^2+n x+n$, using three different values of n. Explain how to find the values of n for which the graph of f(x) will not intersect the x-axis. Then find the solution set.

Construct a table with the headings $q, w, \Delta U$, and $\Delta H$. For each of the following processes, deduce whether each of the quantities listed is positive $(+)$, negative ( $-$ ), or zero.
Freezing of benzene.

Construct amortization schedules for the indicated debts. Adjust the final payments if necessary. $10,000 repaid by three equal yearly payments with interest at 5% compounded annually.

(S)-2-Butanol slowly racemizes on standing in dilute sulfuric acid. Explain

In which of the following is the formula correct for the name given?

chloric acid, $\mathrm{HCl}$

Write the reaction for sodium hydroxide $(\ce{NaOH})$ and phosphoric acid $(\ce{H3PO4})$.

On your paper draw an angle and three segments.

Construct isosceles $\triangle A B C$ so that $A B=A C=t$ and so that the altitude from $A$ has length $s$.

Which line is a better fit for the data in the scatter plot? Explain.