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Based on the average number of moles of IO3- in your samples, and the initial volume of those samples, what is the solubility of Ca(IO3)2 in mol/L of the saturated solution in pure water?
What mass of sucrose should be combined with 537 mL of water to make a solution with an osmotic pressure of 8.55 atm at 290 K ? (Assume the density of the solution to be equal to the density of the
Describe how you would prepare 1.00L of 0.75 M barium hydroxide solution starting with 6.00 M barium hydroxide solution.
Hydrochloric acid is sold as a concentrated aqueous solution. If the molarity of commercial HCL is 12.0 and its density is 1.18g/cm3 Calculate the weight percentage of HCl in the solution.
A 7.00% solution by mass of an enzyme in water has an osmotic pressure of 20.0 torr at 291 K. Calculate the molar mass of this enzyme.
Consider the following equation, for which Keq = 1.4e+83 at 25oC. What is the value of Keq for the reaction H2(g) + 1/2 O2(g) 1/2 H2O(l)?
An ice cube is placed in a beaker of water at 20 c. the ice cube partially melts and the temp of the water is lowerd to 0 c at this point both ice and water are at0 and no further change is apparent.
If 69.5 kJ of heat is applied to a 1036 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous exercise. Perspiration is the body's mechanism for eliminating this heat. How many liters of water wo
A reaction mixture initially contains 0.140 M CO and 0.140 M H2O. What will be the equilibrium concentration of CO? What will be the equilibrium concentration of H2O?
The hydrated salt is overheated and the anhydrous salt thermally decomposes, one product being a gas. will the reported percent water in the hydrated salt be reported to high, too low, or be unaffec
In an experiemtnt, hydrogen gas produced from a reaction between a piece of aluminum and HCL is collected over water and found to have a volume of 3.75 Liters at 25 degrees Celsius.
How many grams of sucrose (C12H22O11) must be added to 589 g of water to give a solution with a vapor pressure 0.933 mmHg less than that of pure water at 20 degrees C? (The vapor pressure of water
The particles of each substance are larger than 0.5 cm in diameter. All you know about the substances is that each is a pure metal. Describe a method for determining the identities of the metals tha
Imagine that you have a 5.00 L gas tank and a 2.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
If 450 ml of some Pb(NO3)2 solution is mixed with 200 ml of 4.40 x 10-2 M NaCl solution, what is the maximum concentration of the Pb(NO3)2 solution added if no solid PbCl2 forms?
What is the pH when 0.005 moles of HCl is added to 0.100L of a buffer solution that is 0.100M in CH3CO2H and 0.100M NaCH3CO2?
Assume that we have a 100 g sample of this compound. The molecular formula mass of this compound is 210 amu. What are the subscripts in the actual molecular formula?
5.00 ml of a water sample was titrated for hardness with 4.15mL of 0.0200M EDTA. Write an equation for the reaction and calculate the hardness of the water in ppm
The volume of the balloon is 12.2 L. The hydrocarbon is 79.89% carbon and 20.11% hydrogen by mass. Determine the molecular formula of the hydrocarbon.
When a solution of Cu(II) chloride, CuCl2 , is added to a solution of potassium sulfide, K2S, a black precipitate of copper sulfide, CuS, forms. Write a balanced chemical equation, ionic equation, net
When H2(g) reacts with C2H4(g) to form C2H6(g), 137 kJ of energy are evolved for each mole of H2(g) that reacts.
Could your drink serve different purposes for different consumers? Explain.What is the normal physiological response to increased intake of sugars? to increased intake of caffeine?
230 mL of an HCl solution with pH of 3.60 is added to 200 mL of an HNO3 solution. The resulting pH is 1.40. What was the pH of the original HNO3 solution?
Assume you dissolve 6.73 grams Na2CO3 in enough water to make 250 mL of solution. What is the molarity of the sodium carbonate?