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The solubility of KNO3 is 155g per 100g of water at 75 degree celsius and 38.0 g at 25 degree celsius. what mass in grams of KNO3 will crystalize out of solution if exactly 100g of its saturated solution at 75 degree celsius is cooled to 25 degree celsius.
A buffer is prepared by adding 1.50X 10^2 ml of 0.250 M NaOH to 2.50X10^2 ml of 0.350 M weak acid, HB. The solution is diluted to 1.00 L. If the pH of the resulting solution is 6.55, what is the pKa of the weak acid
The mass spectrum of an organic compound shows the relative abundances of M to be 67.98% and M 1 to be 15.44%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound.
Magnesium is used in lightweight alloys for airplane bodies and other structures. The metal is obtained from seawater in a process that includes precipitation, neutralization, evaporation
A biochemist is trying to purify the enzyme hexokinase from a bacterium that normally grows in the Arctic Ocean at 5C. In the next lab
Explain why polar solvents would be expected to increase the rate of the reaction in exercise
If a bottle of nail polish remover contains 172 of acetone,how much heat would be released by its complete combustion? The density of acetone is 0.788 .
Write a Lewis structure for each of the following molecules.
At constant volume the temperature of 2.0atm was 325K. The temperature is increased to 400K. What is the new pressure of the gas?
Carbon monoxide gas burns in oxygen to form carbon dioxide gas. Write a balanced equation for the reaction and determine the volume of oxygen needed to react completely with 561 mL of CO at 40.0°C and 1.00 atm.
consider radiation of wavelength of 8000 Angestroms, at a temprature of 1000 K. using a planck law, calculate the energy per unit volume
Determine the mass of acetamide present per kg of water if the freezing point of this solution is 0 °C. (The freezing point of pure water is 0°C (exactly) at 1 atm pressure and the molal freezing-point-depression constant for water is 1.86°C/m.)
Compute the number of moles of H2O will be formed from the reaction 75.1g benzene?
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