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Sodium chlorate (NaClO3(s)) dissociates, during moderate heating to produce solid sodium chloride (NaCl(s)) and gaseous oxygen (O2 (g)). A 3.4671 g of impure sodium chlorate was heated until the evolution of oxygen stopped. The mass of sample residue was subsequently found to be 2.9073 g. What wt% of the original impure sample was really sodium chlorate? Assume that no gases will be evolved from the impurities.
Does coal flue gas react with sand or glass. if so under what conditions?
Consider the cell described below: Al/Al3+ (1.00M)//Pb2+ (1.00M)/Pb Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by .60 mol/L. Assume T=25 C
Calculate the pH of 0.100 L of a buffer solution that is 0.25 M in HF and 0.50 in NaF. What is the change in pH on addition of the following? a) 0.002 mol of HNO3 b) 0.004 mol of KOH
The neutralization of 50.0 mL of 1.00 M hydrochloric acid with 50.0 mL of 1.00 M sodium hydroxide causes a 6.7°C increase in temperature. Predict how the following changes to the experimental protocol would affect the value of the change in temper..
a zero-order reaction has a constant rate of 2.50times10-4 ms . if after 60.0 seconds the concentration has dropped to
A sample of steam with a mass of 0.550grams and at a temperature of 100 degrees celcius condenses into an insulated container holding 4.30grams of water at 6.0 celcius
State a balanced chemical equation for this reaction. Generate a plot of solution pH versus volume of 0.100 M HCL added for the titration of a solution of 250 mg of CaCO3 in 200.0mL of water with 0.100 M HCL; suppose that the HCL solution is added..
A 2kg iron bar (c of iron is 440 J.kg .K) is heated to 80 Celsius. The bar is dipped in 5kg of water at 20 Celsius in a heat insulated container. What will be the equilibrium temperature inside the container?
the addition of anhydrous calcium chloride to the crude product obtained from the separation procedure often results in
Calculate the equilibrium value of Pb+2(aq) in 1.00 L of saturated PbCl2 solution to which 0.250 moles of NaCl(s) has been added. Assume that no volume change occurs.
potassium bromide kbr is soluble to the extent of 64g per 100g of h2o at 20c. is the solution saturated or unsaturated?
How much ice (in grams) would have to melt to lower the temperature of 355 mL of water from 24 C to 6 C (Assume the density of water is 1.0g/ml.
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