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Question: A 2 200 lbm, finely ground mixture of salt and sand is to be separated by adding 1 500 lbm of water to dissolve the salt and then filtering the salt solution from the insoluble sand. The resulting salt solution is then separated by the distillation of 1 350 lbm of water, leaving a final solution that is 92% salt and 8.0% water. Determine the percentages of salt and sand in the original mixture.
A 0.050 mol sample of formaldehyde vapor, CH2O, was placed in a heated 500 mL vessel and some of it decomposed. The reaction is CH2O(g) H2(g) + CO(g). At equilibrium, the CH2O(g) concentration was 0.066 mol L-1 Calculate the value of Kc for this r..
when 24.0 g of glucose a nonelectrolyte are dissolved in 500. gof water the solution has a freezing point of
The atmospheric pressure on Mars is about 2.00 torr, depending on the location. express this pressure in atm psi and kPa
Synthetic polypeptides can assume an helical structure under appropriate conditions. Indicate whether polylysine and polyglutamate form an helix or a disordered structure at the indicated pH values.
consider a gas-phase reaction 2a-> r 2s with unknown kinetics. if a space velocity of 1/min is needed for 90% conversion of a in a plug reactor, find the corresponding space-time and mean residence time or holding time of fluid in the plug flow re..
A healthy stream has an oxygen concentration of 0.00850 g/L. Assuming no biological process affects this concentration, what must be the pressure of oxygen
Sodium-24 is used to treat leukemia and has a half-life of 15 hours. A patient is injected with a salt solution containing sodium-24. What percentage of the 24Na remained after 48 hours
If A certain process results in a gas system releasing 68.3 kJ of energy. Throughout the process, 15.8 kcal of heat is released by the system. If the external pressure is reserved constant at 1.00atm and the initial volume of the gas is 10.0 L, De..
If 0.1800 g of impure soda ash (Na2CO3) is titrated with 15.66 mL of 0.1082 M HCl, what is the percent purity of the soda ash. Na2CO3(aq) + 2 HCl(aq) ? 2 NaCl(aq) + H2O(mc048-1.jpg) + CO2(g)
A 12.0 mL sample of a compound has a density of 1.44 g/mL. What is the weight of the sample in g?
What precautions or what type of actions should the EH&S or FS professionals take when faced with a situation involving polychlorinated biphenyls (PCB's.)?
In few solid calcium carbonate samples, calcium bicarbonate, a(HCO3)2 is also present. State a balanced equation for its reaction with hydrochloric acid. Calcium Carbonate (s) + Calcium BiCarbonate (s) +Hydrochloric acid.
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