Does the vapor pressure of a liquid substance change as the liquid is heated? Explain.

Although we write the formula of sodium chloride as $\mathrm{NaCl}$, we realize that $\mathrm{NaCl}$ is an ionic compound and contains no molecules. Explain.

Steam flows steadily through an adiabatic turbine. The inlet conditions of the stcam are $6 \mathrm{~MPa}, 400^{\circ} \mathrm{C}$, and $80 \mathrm{~m} / \mathrm{s}$, and the exit conditions are $40 \mathrm{~kPa}, 92$ percent quality, and $50 \mathrm{~m} / \mathrm{s}$. The mass flow rate of the stcam is $20 \mathrm{~kg} / \mathrm{s}$. Find $(a)$ the change in kinetic energy, $(b)$ the power output, and $(c)$ the turbine inlet aread.

Sketch the region of integration, and write an equivalent double integral with the order of integration reversed.

$$\int_0^3 \int_1^{e y}(x+y) d x d y$$

Make the indicated pressure conversions.
d. $99,436 \mathrm{~Pa}$ to kilopascals

Indicate which of the following errors, each considered individually, would cause the trial balance totals to be unequal:

a. A fee of $21,000 earned and due from a client was not debited to Accounts Receivable or credited to a revenue account, because the cash had not been received.

Indicate which of the preceding errors would require a correcting entry

What happ ens to water molecules when water is heated from $90^{\circ} \mathrm{C}$ to $110^{\circ} \mathrm{C}$?

Refer to the example below.

a. Which outcome do you think is most likely?

b. Describe the three outcomes using the words likely and unlikely.

c. Use the number of times each event occurred to calculate the probability of each event.

d. What do you think would happen if you performed more trials?

$$\begin{array}{|l|c|} \hline {}{}{ Outcome } & Experimental Probability \\ \hline Open-end up & \frac{\text { open }-\text { end up }}{30}=\frac{}{30} \\ \hline Open-end down & \frac{\text { open }-\text { end down }}{30}=\frac{}{30} \\ \hline On its side & \frac{\text { on its side }}{30}=\frac{}{30} \\ \hline \end{array}$$

e. What is the sum of the three probabilities in question 1c?

Example:

You can toss a paper cup to demonstrate experimental probability.

Consider tossing a paper cup. What are the three different ways the cup could land?

Toss a paper cup thirty times. Record your observations in the table.

$$\begin{array}{|l|l|} \hline {}{}{\text { Outcome }} & \text { Number of Times } \\ \hline \text { Open-end up } & \\ \hline \text { Open-end down } & \\ \hline \text { On its side } & \\ \hline \end{array}$$

Which of the following molecules is (are) not polar? For each polar molecule, indicate the direction of polarity-that is, which is the negative end and which is the positive end.\

$$CO$$

Draw the products of the following reactions. If the products can exist as stereoisomers, show which stereoisomers are formed. a.

$$cis-2-pentene + HCl,$$

b.

$$trans-2-pentene + HCl,$$

c.

$$1-ethylcyclohexene + H_2O + H_2SO_4,$$

d.

$$2,3-dimethyl-3-hexene + H_2, Pd/C,$$

e.

$$1,2-dimethylcyclohexene + HCl,$$

f.

$$1,2-dideuteriocyclohexene + H_2, Pd/C,$$

g.

$$3,3-dimethyl-1-pentene + Br_2/CH_2Cl_2,$$

h.

$$(E)-3,4-dimethyl-3-heptene + H_2, Pd/C,$$

i.

$$(Z)-3,4-dimethyl-3-heptene + H_2, Pd/C,$$

j.

$$1-chloro-2-ethylcyclohexene + H_2, Pd/C$$

Suggest why $\mathrm{Be}^{2+}$ has a higher affinity for $\mathrm{H}_2 \mathrm{O}$ molecules than $\mathrm{Mg}^{2+}$.

Sketch the region of integration and write an equivalent integral with the order of integration reversed.

$$\int_{0}^{1} \int_{x}^{2-x} f(x, y) d y \ d x$$

Explain the problem with the following statement and correct it. "When a chemical equation is balanced, the number of molecules of each type on both sides of the equation is equal."

State the integration formula you would use to perform the integration. Explain why you chose that formula. Do not integrate. ∫ x / x²+1 dx