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75.0 g of ammonium sulfate is placed in a 500.0 ml flask and diluted volume.
1) What is the percent by mass concentration of this solution? (assume the solution density is 1.00 g/ml)
2) What is the molarity of the solution?
3) How many moles of ions are present in the flask?
Urea { (NH2)CO } is used for fertilizer supplyingnitrogen to the soil. Calculate the number of N atoms foundin 1.68 * 10^4g of urea.
Water supply in a city is fluoridated by adding NaF. The preferred concentration of F- is 1.6ppm.calculate the amount of Naf in milligrams should be added per gallon (treated water) if the water supply is 0.2 ppm in F-?
How much 0.500M Au(no3)3 solution would you need to prepare to accomplish this? C. What is the mass of gold transferred to the medallion?
The land area of Greenland is 840,000 mi2 with 132,000 mi2 free of ice. The average thickness of ice is 5000 ft. The density of the ice is 0.917 g/ml. Calculate the mass of ice in tons
In a 0.10 M solution of a weak diprotic acid H2A the species present in highest concentration (besides water) would be
A certain quantity of a gas occupies 61.3 mL at 68C. If the pressure remains constant, what would the volume of the gas be at 17C?
what is the internal energy change of a gas gives off 312 of heat while being compress 862mL by a pressure of 1.64 bar. what are internal energy change in surrounding and universe for the process
determine the pressure of a gas using the ideal gas law.dry ice is solid carbon dioxide. a 0.050-g sample of dry ice is
Is there a chart that shows the solubility of SrSO4 in water verses temperature and PH
the equilibrium constant, Kc, for this reaction is 4.6 x 10^-3. N2O4(g) 2NO2(g). if the equilibrium mixture contains .050 M NO2 what is[N2O4]
2-methyl-2-butene and 2-methyl-1-butene with Br2 in CH2Cl2
Iridium-192 is often used in the head or breast. Answer the following three questions (a, b, and c) based on the radioactive decay curve of iridium-192, shown below. Click on the graph and move the mouse over a point to get values for that point.
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