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Determine the empirical formula for a compound that is found to contain 10.15 g P and 34.85 g Cl.

Green light has a wavelength of 5200 Å. Calculate the energy of one photon of green light.

Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol.      IE1, 1314       IE2, 3389       IE3, 5298       IE4, 7471      IE5, 10992     IE6, 13329     IE7, 71345     IE8, 84087

A weather balloon was initially at a pressure of 0.950 atm, and its volume was 35.0 L. The pressure decreased to 0.750 atm, without loss of gas or change in temperature. What was the change in the volume?

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (Pwater = 24 torr at 25°C)

When HNO3 is slowly dropped onto a piece of CaCO3, bubbles appear on the surface of the solid. Which of the following explains this observation?  (Chapter 5 Reading Question 9 from your textbook)

If 0.750 L of argon at 1.50 atm and 177°C and 0.235 L of sulfur dioxide at 95.0 kPa and 63.0°C are added to a 1.00-L flask and the flask’s temperature is adjusted to 25.0°C, what is the resulting pressure in the flask?

Which of the following atoms will be diamagnetic?

A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm.  What is the molar mass of the gas?

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is their wavelength at this speed if their mass is 84.5 kg?