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A 4.00 solution of was prepared using 1.00 of water at 25.0 . Once the solid had all dissolved, the temperature of the solution was 12.3 . Calculate the heat of solution, , of . Assume that the specific heat of the solution is identical to that of water, 4.18.
Calculate the total mass of the neutrons in 19/9F. Use 1.008665 amu as the mass of 1/0N(mass of a neutron). Express your answer in atomic mass units to 7 significant figures. Calculate the mass defect of 19/9F. Use 18.9984 amu as the actual mass o..
At equilibrium a 2L vessel contains .410 mol of H2, .130mol of Br2, and 36.0 mol of HBr. What is the equilibrium constant for the reaction at this temperature?
Why is saturated sodium chloride solution, rather than dilute solution specified for the final washing of the 2-chloro-2-methylpropane produced? (created from 2-methyl-2-propanol)
A buffer is made up of 355 mL each of 0.200 M NaHCO3 and 0.134 M Na2CO3. Assume that volumes are additive. Enough water is added to this buffer to make the total volume 10 L. Calculate the pH of the buffer after the addition of 0.0300 mol of HCl t..
A 158-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
What volumes of these two solutions must you mix in order to obtain 200 mL of your required buffer
You have discovered a new element with an atomic weight of 260 g/mol and a density of 30 g/cm3. If the atoms pack on a BCC lattice what is the hard sphere atomic radius R (in nm)
Carbon dioxide has an enthalpy of sublimation of 25.2 kJ/mol at -78 OC. If 0.975 kg of dry ice is placed into a bowl open to the atmosphere (i.e., constant pressure), what is the entropy of sublimation at this temperature
in order to make a solution that i s0.030 M in Cu SO4 what volume of the above solution should be diluted to 5.00 mL with water?
Calculate the mass in grams for a sample of Al that absorbs 1.70kJ when the temperature increases from 56 degree Celsius to 177 degree Celsius?
In May 1990 the French TGV train traveled the distance from Paris to Lille, France (127 miles) in .819 hours. What was the speed of the TGV in m/s?
What percentage of the original mass remains in a radioactive sample after two half-lives have passed. After three half-lives. After 3.5 half-lives
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