1. The emission spectrum of mercury atoms has a bright green line with wavelength 546.1 nm.
Calculate the frequency of these photons. Show your work.

Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?