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Explain when 0.593 g of an unknown solute is dissolved in 14.9 g of water, the freezing point is depressed by 1.74 Celsius degree. Compute the molecular weight of the unknown solute, pretentious that it is a nonelectrolyte.
Calculate the pH of the final solution after 250 mL of a 0.157 mol dm-3 solution of HCl is added to 500 mL of a 0.103 mol dm-3 solution of NaCN (Ka HCN = 6.2 × 10-10).
find the temperature and the pressure of a gas inside the cylinder.1. a gas at 71degc occupies a volume of 0.67 l. at
A 1.20 gram sample of dry ice is added to a 755mL flask containing nitrogen gas at a temperature of 25.0 degrees Celsius and a pressure of 725 mmHg. The dry ice is allowed to sublime and the mixture is allowed to return to 25.0 degrees Celsius. wh..
The mass of a 0.106 mol of a compound is 6.366 g. What is the molar mass of this compound to three significant figures
How should the two heats of reactions for the neutralization of NaOH and the two acids compare? Why?
Normalize the wave function x(a - x) y(b - y) over the range 0
Provide a structure for the following compound: molecular mass 101; IR: 3397, 3200, 1655, 1622 cm-1; 13C NMR: ? 27.5, ? 38.0 (weak)
A 15.2 g steel sample that contains 10.69 g iron, 2.67 g chromium, 1.22 g nickel, 0.306 g manganese, 0.153 g silicon and 0.122g carbon. What is the concentration of each substance
if 25.4 ml of 0.234 mfecl3 solution is mixed with 43.6 ml of 0.448 m naoha. what is the maximum mass in gramsof the
If a chemist wishes to prepare a buffer that will be effective at a pH of 5.0 and 25C, which of the following would be the best choice for the acid component and WHY
what impurities do you think are probably in your crude aspirin product? where do those impurities go in the
A mixture of water and graphite is heated to 600 K. When the system comes to equilibrium it contains 0.13 mol of H2, 0.13 mol CO, 0.43 mol of H2O and some graphite
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