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Describe how you would prepare a 500 mL of a solution which is 0.500 M sodium and 1.60 M phosphate if you only had sodium chloride and potassium phosphate available? NOTE: The chloride and potassium ion concentrations in the final solution are unimportant. ANSWER OPTIONS: A) Add 14.61 g NaCl and 169.78 g of potassium phosphate to 500 mL graduated cylinder and fill to the 500 mark. B) Add 5.75 g of NaCl and 76.0 g of potassium phosphate to a 500 mL volumetric flask and fill with distilled water to the mark. C) Add 14.6 g of NaCl and 170. grams of potassium phosphate to a 500 mL volumetric flask and fill with distilled water to the mark. D) Add 14.6 g of NaCl and 170. grams of potassium phosphate to a 500 mL graduated cylinder and fill to 500 mLs.
A patient needs to take 375 mg of ibuprofen twice daily. The pills in the bottle are each 250. rm mg. How many pills does the patient need to take each time she wants the 375 mg dosage? Assume that these pills are scored and can be cut in half if ..
A balloon contains 0.128 mol of gas and has a volume of 2.76L. If an additional 0.073 mol of gas is added to the balloon (at the same temperature and pressure), what will its final volume be.?
If the temperature is 22 degrees C, the total pressure in the tank is 3.50 atm, and the density of the gas in the tank is 1.17 g/L, what is the partial pressure of H2?
An electron in an atom of Lithium sees an effective nuclear charge of 1.91 at a radius of 152pm. An electron in an oxygen atom sees an effective nuclear charge of 4.45 at a radius of 73pm. How much greater is the attraction between an oxygen elect..
At 700 K the equilibrium constant for the reaction CCl4(g) C(s) + 2 Cl2(g) is Kp = 0.76. A flask is charged with 2.00 atm CCl4, which then reaches equilibrium at 700 K.
How high will a hot air balloon rise if the temperature inside is maintained at 330 K? Assume that the ambient temperature is 300 K. Assume that the pressure inside and outside are the same, but the density inside is reduced by heating
Calcium in blood or urine can be determined by precipitation as calcium oxalate CaC2O4. The precipitate is dissolved in strong acid and titrated with potassium permanganate. The products of the reaction are carbon dioxide and Manganese ii ions.
How many grams of riboflavin (molecular mass = 374.6g/mol) are required to prepare a 1.00L solution that is 5.00 x 10^-5 M
A sample of helium gas initially at 37.0 °C, 785 torr and 2.00 L was heated to 58.0 °C while the volume expanded to 3.24 L. What is the final pressure in atm
the following changes in a DNA molecule may have no effect on the protein for which the DNA codes
how do you calculate the effective temperature of jupiter if the sun is its only source of heat given that jupiter is 7.8*10^8 km from the sun and has an albedo of 0.73
the actual yield of a reactant is 22 g and the theoreticaal yield is 25 g calculate the percentage yield
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