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When sodium reacts with chlorine, 411 kj/mol is released. Calculate the amount of heat released if 1.37 mol of sodium form.
Explain why a 1m solution of the compound FeCl2 in water has a lower freezing temperature than a 1m solution of KCl in water and what is the empirical formula
If the volume of solute is 6 ml and the volume of the solution is 300 ml, what is the solute's percent by volume?
Crystallization of sodium acetate from a supersaturated solution occurs spontaneously at constant temperature and pressure. What can you deduce about the signs of ?S and ?H for this process?
You found that pH=pKa=4.2 when 12.50 mL of NaOH hadbeen added. The concentration of the sodium hydroxide was 0.500M. Calculate the initial percent dissociation of the acidsample.
Estimate the value of the equilibrium constant at 610K for each of the following reactions. Delta Hf and S for BrCl is 14.6 kj/mol and 240.0 J/mol*K , respectively. Br2(g)+ Cl2(g) --> 2BrCl(g)
NO is produced in the atmosphere at moderately low partial pressure by high temperature combustion. What is its fate as cooling occurs? To help address the question, calculate the equilibrium constant at 298 K and 1300 K for each reaction
A 0.300-M solution of X (Mm = 171 g/mol) has a density of 1.096 g/ml. What is the molality of X in the solution?
Calculate Delta Hrxn for the following reaction- Fe2O3 (s) + 3CO (g)-----> 2Fe (s) + 3CO2 (g). Use the following reactions and given delta H's. 2Fe (s) + 3/2O2 (g)----->Fe2O3 (s), Delta H= -824.2 kJ CO (g) + 1/2O2 (g)----->CO2 (g), Delta H=-282.7 ..
The component of structure responsible for holding the 4 chains of hemoglobin together is a. primary
Consider a 2430-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). If the position of the car is known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car?
the dissolution of nh4clo4 in water is endothermic with change of h33.5kjmol. if you prepare a 1.00m solution of
The normal melting point of benzene is 5.5 degrees Celsius . For the process of freezing, what is the sign for each of the following: a) Delta Hsys b) Delta Ssys c) Delta Gsys at 5.5 degrees Celsius d) Delta Gsys at 0 degrees Celsius
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