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How would the absorbance of the standard solution have been affected if 0.00050 M NaSCN had been used in place of 0.00040 M? if it changes, calculate the new absorbance based on your values.
Much commercial hydrochloric acid is prepared by the reaction of concentrated sulfuric acid with sodium chloride: H2SO4 + 2NaCl → Na2SO4 + 2HCl
calculate the work done when 65.0 g of tin dissolves in excess acid at 1.00 bar and 23degc. assume ideal gas
Problem- Calculate the standard free energy changes for the decomposition of solid magnesium oxide into solid magnesium and oxygen gas.
Find the heat transferred (in kJ) when 5.55 L of ethylene glycol (d = 1.11 g/mL) in a car radiator cools from 40.0°C to 25.3°C.
A buffer that contains 0.49 M of the base, B, and 0.29 M of its conjugate acid, BH+, has a pH of 8.10. What is the pH after 0.0025 mol HCl is added to 0.25 L of this solution
What are the similarities between distillation and sublimation. When would you choose one over the other.
In ploystyrene beaker , we mixed 30 mL of 0.1 M sodium acetate and 15 mL of 0.1 M hydrocloric acid. we measured the PH ( in PH meter ) it was 4.86 and then we added 5 mL of 0.1 M NaOH to this buffer.
The density of H2O2 is 1.463g/ml and the density of O2 is 1.428 g/l. How many liters of O2 will from 55.0mL of H2O2?
Calculate the heat released when 156 g of water at 23.0 degrees celcius is convered to ice at -10.0 degrees celcius
An oxygen molecule is adsorbed onto a small patch of the surface of a catalyst. It's known that the molecule is adsorbed on 1 of 36 possible sites for adsorption
a solution of 4.93 g of a carbohydrate in 100.0 g of water has a density of 1.017 gml and an osmotic pressure of 3.36
A backyard swimming pool holds 190 cubic yards ({{yd}}3) of water. What is the weight of the water in pounds
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