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Consider the following reaction of aluminum hydroxide and hydrogen chloride to form aluminum chloride and water. if 73 g of hydrogen chloride reacts with excess aluminum hydroxide to end up with 27g of aluminum chloride, what is the percent yield of the reaction? a. 30% b. 67% c. 50%
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Nitric oxide (NO) reacts instantly with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas. 2 NO(g) + O2(g) 2 NO2(g)
A semipermeable membrane is placed between the following solutions. Which solution will decrease in volume. Solution A: 1.31% (m/v) starch Solution B: 7.48% (m/v) starch
A soft drink contains 35 mg. of sodium in 315g. of H2O. What is the concentration of sodium in the soft drink in mass percent?
A tanker carrying 800 kg of BOD waste accidently overturns and spills into a pond with a volume of 100,000,000 L. Assume the pond is completely mixed and has an initial DO of 6.4 mg/L and a temperature of 20°C
If 4.05 x 1023 molecules of a substance have a mass of 86.2 g, what is the molar mass of the substance? How many nitrate ions are present in 0.200 mol of Zn(NO3)2?
In the titration of a weak base (0.100 M piperazine, 40 mL) with a strong acid (0.100 M HCl). Calculate the pH values between 0 mL Va and 100 mL in 10 mL steps. The two Ka values of piperazine are 4.65 x 10^-6 and 1.86 x 10^-10
how much heat is released when 75.0 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol
Cyclohexane can be used as a solvent for freezing point depression measurements. When 1.07 g of naphthalene (MW = 128.17 g/mol) is mixed with 51.29 g of cyclohexane, the freezing point of the resulting solution is 3.29 °C.
5.00 ml of a water sample was titrated for hardness with 4.15ml of 0.0200m edta. write an equation for the reaction and
A student dissolves 1.01 grams of nicotinic acid, C_6_H_5_NO_2_, in water to give 60 mL of solution having a pH of 2.67. What is the approximate value of Ka for the acid based on this observation?
all possible structural formulas for all different conjugated dienes that can be completely hydrogenated
Calculate the k value associated with the reaction at 25 degrees celcius given the Gibbs free energy of formation of N2H4 is -419.15Kj/mol
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