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How many protons, neutrons, and electrons are in an atom of osmium-190?

What is the molecular shape of a chloroform, CHCl3, molecule?  

The solubility maximum for LiCl is given below for several different tempratures: 70 g LiCl in 100 g water @ 5o C 83 g LiCl in 100 g water @ 25o C 105 g LiCl in 100 g water @ 55o C If a solution contains 465 g LiCl in 633 g water @ 5o C, then it would be

If 6.50 mL of a 6.0 M HCl solution is diluted with water to make a 0.15 M HCl solution, what is the final volume of the dilute solution? Show your work below (use the math equation  function from the toolbar above if needed).

An unknown gas occupies a volume of 1.50 L at 21°C and 0.950 atm. If the mass is 2.01 g, what is the molar mass of the gas? (R= 0.0821 atm•L/mol•K)

All of the following would indicate a need for mechanical ventilatory support EXCEPT:

Which one of the following atoms has the lowest first ionization energy?

Write the shorthand electron configuration (using noble gas core) for the element lead, Pb: Use the T2 function in the tool bar to show superscripts.

Bonus Question worth 3 points. Which of the following is an example of an ionic crystalline solid?

A sample of nitrogen gas occupies 450.0 mL at 751 mm Hg and