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A sample of hydrated salt of 1.15 grams ZnSO4.xH2O is dissolved in H2O and the sulfate ion is precipitated by adding an excess of BaCl2 solution. The mass of pure and dry BaSO4 precipitated =0.9335g. What is the formula of the zinc sulfate hydrate? name this compound.
Calculate the density of xenon gas at 182 oC and 605 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
The vapor pressure of dichloromethane,CH_2Cl_2, at 0 degrees C is 134 mmHg. The normal boiling point of dichloromethane is 40. degrees C. Calculate its molar heat of vaporization.
calculate the pH of solution formed by mixing 150 mL of 0.10M HC7H5O2 with 100 mL of 0.30M NaC7H5O2. The Ka for HC7H5O2 is 6.5 E -5
At 1100 K, Kp = 0.25 for the following reaction. 2 SO2(g) + O2(g) reverse reaction arrow 2 SO3(g) What is the value of K at this temperature?
Determine the final pH of a solution that is prepared by mixing 25 mL of 0.15 M sodium hydroxide( NaOH )with 20. mL of 0.20 M HA,( a weak acid with Ka = 2.3 x 10-6)?
In a Diels-Alder reaction between 1mL (12mmol) of cyclopentadiene and 1.393 g (12mmol) of maleic acid, How do you calculate the Theoretical Yield
Balance the following equation in acidic solution using the lowest possible integers and give the coefficient of water
Consider the reaction 2 NO2(g) N2O4(g) . (a) Using Gf N2O4(g) = 97.79 kJ/mol and Gf NO2(g) = 51.3 kJ/mol, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the partial pressures of NO2 and N2O4 are 0.40 atm and 1.40 atm, respectively. kJ
what relative masses of dimethyl amine and dimethyl ammonium chloride do you need to prepare a buffe
calculate the value of ?Horxn for the following chemical equation: N2H4(l) + O2(g) ? N2(g) + 2 H2O(g)
Insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 375 of insulin at a concentration of 50.0 . What is the total mass of insulin in the bottle?
Write an equation showing the reaction of methanol (CH3OH) with HClO 4 as a Brønsted-Lowry acid. Answer: CH3OH + HClO4 -> CH3OH2+ + ClO4- Why is it ClO4-?
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