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What is the PH of the buffer that results when 12.0 g of NaH2PO4 and 8.00 g of Na2HPO4 are diluted with water to a volume of .50 L? (Ka of H2PO4=6.2*10^-8, the molar masses are 120.0 g/mol and 142. mol respectively.
Explain the hazards associated with 1.0 moles of Ch3COOH solution, 0.10 moles of BaCL2 sloution, and 0.10 moles Na2C2O4 solution?
Draw the structure of aspiring and assign each different type of proton(s) a letter. Then assign the letters to their corresponding peak in the NMR spectrum
A student reacts 0.3000 grams of a sulfate-containing unknown with excess barium chloride. If 0.6500 grams of barium sulfate is produced, what is the percentage sulfate in the unknown?
The solubility of oxygen gas at 50*C is 27.8 mg/L at an oxygen pressure of 1.00 atm. The solubility of nitrogen gas at 50*C is 14.6 mg/L at a nitrogen pressure of 1.00 atm. Assume that the air above the water contains an oxygen partial pressure of..
What are the direction and magnitude of the velocity of plane 1 relative to plane 2? What is the Degrees? ° north of east
Tincture of iodine is I2 dissolved in ethanol, C2H5OH. A 1% solution of tincture of iodine is 10.0g of solute for 1000. g of solution. How many grams of solvent are present in 1000. g of this solution? How many moles of solute are in 10.0g of I2? ..
a solution is prepared by adding 40.3 g of Mg(NO3)2 to 127 g of water. Calculate the mole fraction and molality of magnesium nitrate in this solution
2 liquids, A and B, have the same molecular weight. Samples of each are placed on temperature probes and allowed to evaporate. After a period of time Liquid A had a change in temp
A patient has 48 ml. of blood drawn and this volume of blood has a mass of 39.5 g. what is the specific gravity of the blood?
calculate the total heat (in J) needed to convert 20.0g ice at -8.00 c to liquid water at 0.600c? melting point at 1 atm
conversion of 0.95g of liquid water to steam at 100 clesius requires 2.1 kJ of heat. calculate the molar enthalpy of evaporation of water at 100 celsius
A cook wants to heat 1.73 kg of water from 30.0C to 100.0C .If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn.
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