During the pyramid-building era the ancient Egyptians used two units of length, the palm
and the ell. An ell was 7 palms and a palm
was about 3 inches.
If a hawk is tracked at a diving speed of 3
ells per second, what is its speed in inches per
second?
1. 126 in/s
2. None of these
3. 63 in/s
4. 0.7 in/s
5. 98.6in/s
6. 21 in/s
7. 5.25 in/s
8. 1/3 in/s
9. 7in/s
10. 42 in/s

You just calculated that the heat of fusion for chloromethane is 6400 j/mol. the heat of fusion for hydrogen is 120 j/mol.? which of the following account for this difference? more than one correcta. chloromethane can absorb more energy at the same temperature. b. hydrogen has stronger intermolecular forces than chloromethane. c. hydrogen molecules can pack more closely than chloromethane molecules. d. chloromethane experiences dipole-dipole interactions. e. chloromethane has a higher molar mass than hydrogen.

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals

Wind and moving water provide energy. chemical mechanical thermal none of the above