A laser pointer used in a lecture hall emits light at 650 nm. What is the frequency (ν) of this radiation? Given c = λν, the speed of light (c) is 2.99 x 108m/sec, and 1 nm = 1.0 x 10-9 m.

Lithium has two naturally occurring isotopes, 6Li and 7Li. The average atomic mass of lithium is 6.941. Which of the following statements concerning the relative abundance of each isotope is correct?

A mixture of 6.00 g O2(g) and 9.00 g CH4(g) is placed in a 15.0-L vessel at 0 °C. What is the total pressure in the vessel? Ideal gas constant, R = 0.08206 L-atm/mol-K

Which molecular force must be overcome for methanol (CH3OH) to convert from a liquid to a gas?

What is the hybridization of the central atom in GaH3?

Using a molecular orbital diagram, what is the bond order for N2?

What is the percent composition of hydrogen in codeine?

We calculated reaction enthalpies based on the average bond enthalpies for the bonds broken in the reactants and the bonds formed in the products. What must be true for a reaction to be exothermic?

How many valence electrons does an atom with the electron configuration 1s22s22p63s23p4 have?

If total peripheral resistance and heart rate remained the same, what effect would a decrease in blood volume