a. Listing What are the general characteristics of solids? b. Comparing and Contrasting How do crystalline solids differ from amorphous solids? c. Drawing Conclusions A glass blower can bend and shape a piece of glass that has been heated. Is glass a crystalline or an amorphous solid? Explain.

Draw charge-separated resonance structures to give a representation of the bonding in $\mathrm{PF}_5$ such that the octet rule is strictly obeyed.

What is the potential difference across a 10 mH inductor if the current through the inductor drops from 150 mA to 50 mA in $10 \mu \mathrm{s}$? What is the direction of this potential difference? That is, does the potential increase or decrease along the direction of the current?

What kind of hybrid orbitals would we expect the central atom to use for bonding in (a) $\mathrm{PCl_3}$ and (b) $\mathrm{BrCl_3}$?

You are designing a ski jump ramp for the next Winter Olympics. You need to calculate the vertical height h from the starting gate to the bottom of the ramp. The skiers push off hard with their ski poles at the start, just above the starting gate, so they typically have a speed of 2.0 m/s as they reach the gate. For safety, the skiers should have a speed no higher than 30.0 m/s when they reach the bottom of the ramp. You determine that for a 85.0-kg skier with good form, friction and air resistance will do total work of magnitude 4000 J on him during his run down the ramp. What is the maximum height h for which the maximum safe speed will not be exceeded?

Can a tab have a text as well as an image? Write the code to set an image for tab1 in Listing $31.12$.

Name A chemical reaction is another name for a chemical (combustion / change).

Which of the following statements concerning molecular orbital theory is true?

I) Bonding orbitals are lower in energy than their corresponding anti-bonding orbitals.

II) If a molecule has an odd number of electrons, then it is paramagnetic.

III) The MO diagrams for O$_2$, F$_2$, Ne$_2$ are not fillled using the Aufbau principle.

where is accumulated depreciation on balance sheet?

If a 1-megaton nuclear bomb were exploded deep in the Greenland ice cap, how much ice would it melt? Assume the ice is initially at about its freezing point, and consult Appendix $\mathrm{C}$ for the a

For each proportion give the equation that states that the product of the extremes equals the product of the means. Do not solve. $\frac{3}{y}=\frac{7}{8}$

Assign a binary code in some orderly manner to the 52 playing cards. Use the minimum number of bits.

Describe the oxidizing action of potassium dichromate and write the ionic equations for its reaction with:
(i) iodide
(ii) iron(II) solution and
(iii) $\mathrm{H}_2 \mathrm{~S}$

Many random number generators allow users to specify the range of the random numbers to be produced. Suppose that you specify that the range is to be

$$0 \leq Y \leq 2$$

. Then the density curve of the outcomes has constant height between 0 and 2, and height 0 elsewhere. What is the height of the density curve between 0 and 2? Draw a graph of the density curve.