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How were atomic masses for the elements determined?
How many grams sodium chloride (NaCl) should be used in preparing 22 L of a solution containing 147 mEq/L? (atomic wt of sodium is 23, atomic wt of chloride is 35.5).
what is the pressure at the under water site. Pressure increases at 1.0 atm for every 10 m depth; at what depth was the diver working. Assume the temp remains constant.
Imagine that you have a 6.50L gas tank and a 2.50L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
A solution is prepared by dissolving 0.18 moles of acetic acid and 0.18 moles of ammonium chloride in enough water to make 1.0 L of solution. Find the concentration of ammonia in the solution.
Problem- One mole of graphite , C (gr), is converted to CO (g) in the presence of oxygen at 25.0 degrees C and at 1 atm. in this process, 26,416 cal or 1.1052 * 10^5 J of heat is evolved. 1) What is heat of formation of CO (g)
In a calibration of a calorimeter, 50.0 g of water at 60.0 c is added to 50.0 g of water at 20.0 c to give a mixture at 39.0 c. what is the heat capacity of the calormieter used in this experiment. If calorimeter has a mass of 5.4 g, what is it sp..
The solubility product for Zn(OH)2 is 3e-16. The formation constant for the hydroxo complex, Zn(OH)4 2- is 4.6e17. What is the minimum concentration of OH- required to dissolve 1.2e-2 mol of Zn(OH)2 in a liter of solution
The sodium hydroxide solution was prepared by dissolving 10.00 g of solid NaOH in sufficient water to form 200.00 mL of solution. If the equivalence point was reached after the addition of 23.50 mL of the NaOH solution, what is the molarity of HNO..
Explain the pH change when the strong acid was added to the prepared buffer solution in relation to the pH of the buffer solution . Also indicate the change in the ph when the acid was mixed with the deionized water in relation to the deionized wa..
calculate the final temperature of the water after all the ice melts. heat capacity of H2O: 37.7 J/mol*k heat capacity of H2O l: 75.3 J/mol*k enthalpy of fusion of H2O: 6.01 kJ/mol
Combining aqueous solutions of BaI2 and Na2SO4 gives a precipitate. Which ion(s) is/are spectator ions in the reaction
what ir peaks were the major ones that allow you to determine from your ir analysis which alcohol stereoisomer (endo or exo) predminated in the product obtained in your reduction of camphor
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