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A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.23 degrees celsius. What is the composition by mass of the solid?
What is the basic structure of phosphatidyl cholines, and how do they work as emulsifiers? Why is there so much research interest in phosphatidyl cholines
If solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 2021 kPa?
A compound is found to have a molar mass of 598 g/mol. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25°C, what is the osmotic pressure of the resulting solution?
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
what the final orbital should be ? would you expect Rh to be paramagnetic or diamagnetic? Explain your answer to each question? please explain in details so its easy for me to understand this.
For the reaction: N2(g) + 2 O2(g) ? 2 NO2(g), Kc = 8.3 × 10-10 at 25°C. What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas.
When pentane C5H12 burns in oxygen, it produces carbon dioxide and water. If 85.5 g of pentane is burned, what voulume of carbon dioxide is produced at STP (The density of CO2 is 1.997 g/L.)
A 31.0-g sample of water at 290. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Rex Ryan mixed peroxide with yeast to generate oxygen gas and collected the gas in a graduated cylinder, using the same set up as was used in Experiment 11. He collected the following data
Solid phosphorus pentabromide, PBr5, has been shown to have the ionic structure [PBr4+][Br? ]. Write the electron-dot formula of the PBr4+ cation
Consider the cell prepared with 2.0 M Cd2+ and 0.45 M Zn2+ solutions: Zn(s) + Cd2+(aq) --- Zn2+(aq) + Cd(s)
mixture of 2-amino-propanoic has a specific rotatio of -5.6. What is the percent composition of the mixture of the specific rotation for the S enantiomer is +14.5
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