What percent (by moles) of he is present
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508g/L at 25C and 721mmHg?
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what concentration of x would be required for the transmittance to be increased by a factor of 3 when a factor of 3 when a 1.00-cm cell was used?
How to connect two n channel mosfet and then how we can measure the surface potential between its common drain point?
Determine the work done by a 1-lb fluid system as it expands slowly within a piston-cylinder arrangement from an initial pressure and volume of 80 psia.
25.0 mL of ethanol (density = 0.789 g/mL) initially at 7.4°C is mixed with 32.1 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
The solubility of barium carbonate,BaCO3, is .0100 g/L . Its molar mass is 197.6. What is the Ksp of barium carbonate?
Bromothymol blue is a common acid-base indicator. It has a Ka equal to 1.6 X 10^-7. Its unionized form is yellow and its conjugate base is blue. What color would a solution have at pH=5.8?
Ozone reacts with nitric oxide discharged from jet planes to form oxygen gas and nitrogen dioxide. 0.740g of ozone react with 0.670g of nitric oxide. Determine the identity and quantity of the reactant supplied in excess.
The first billiard ball completely stops and the second one rolls away with a velocity of 3.8 . Assume the first billiard ball is the system. Find the Work, q(heat) and delta H.
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