Predict the trend in lattice energy, from least negative to most negative, for the following compounds based on the ion charges and ionic radii: LiI, LiF, CaO, RbI.

Determine how many tin atoms are contained in the tetragonal crystal lattice unit cell of $\beta$-tin. How many tin atoms are contained in the cubic crystal lattice unit cell of $\alpha$-tin?

What mass of lithium can be acquired from 73 million metric tons of lithium carbonate? (1 metric ton = 1000 kg.)

The radioactive isotope ${ }^{01} \mathrm{Cu}$ is used in the form of copper(II) acetate to study Wilson's disease. The isotope has a half-life of $12.70$ hours. What fraction of radioactive copper(II) acetate remains after 64 hours?

The radius of a circle is increasing: At a certain instant; the rate of increase in the area of the circle is numerically equal to twice the rate of increase in its circumference. What is the radius of the circle at that instant?

In Fahrenheit 451, why would society make being a pedestrian a crime?

When $108 \mathrm{~g}$ of water at a temperature of $22.5^{\circ} \mathrm{C}$ is mixed with $65.1 \mathrm{~g}$ of water at an unknown temperature, the final temperature of the resulting mixture is $47.9^{\circ} \mathrm{C}$. What was the initial temperature of the second sample of water?

Nitrogen monoxide, a gas recently found to be involved in a wide range of biological processes, reacts with oxygen to give brown $\mathrm{NO}_2$ gas.

$$2 \mathrm{NO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2(\mathrm{~g})$$

Is this reaction endothermic or exothermic? What is the enthalpy change if $1.25 \mathrm{~g}$ of $\mathrm{NO}$ is converted completely to $\mathrm{NO}_2$?

A chemist finds that 30.82 g of nitrogen will react with 17.60, 35.20, 70.40, or 88.00 g of oxygen to form four different compounds. Calculate the mass of oxygen per gram of nitrogen in each compound.

If 27.1 g of Ar(g) occupies a volume of 4.21 L, what volume will 1.29 moles of Ne(g) occupy at the same temperature and pressure?

What is the correct way to write scientific names in the binomial nomenclature system?

Chlorine dioxide, $\mathrm{ClO}_2$, a yellow-green gas, can be made by the reaction of chlorine with sodium chlorite:

$$\begin{align*} 2 \mathrm{NaClO}_2(\mathrm{~s})+\mathrm{Cl}_2(\mathrm{~g}) \rightarrow 2 \mathrm{NaCl}(\mathrm{s})+2 \mathrm{ClO}_2(\mathrm{~g}) \end{align*}$$

Assume you react $15.6 \mathrm{~g}$ of $\mathrm{NaClO}_2$ with chlorine gas, which has a pressure of $1050 \mathrm{~mm} \mathrm{Hg}$ in a $1.45$-L flask at $22{ }^{\circ} \mathrm{C}$. What mass of $\mathrm{ClO}_2$ can be produced?

The following figure shows the graph of a function $h$.

Which is larger, $h(b)$ or $h(0)$ ?

A population of 250 birds inhabits the canopy of a tropical rainforest that has a carrying capacity of 400 birds.

What is the maximum population growth rate (max) if the population grows to 283 in one year?

(A) 0.12

(B) 0.13

(C) 0.35

(D) 0.39