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You add 50 mg of CaCl2 to 1-L of water. Determine the concentration of calcium and chloride in the solution in both mg/L and mmol/L. You will need to find the molecular weights on a periodic table.
Determine the value of Faraday used If the electrolysis was carried out for eighty minutes with a current of four amperes flowing
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 in aqueous NaCN.
What is the mass flow rate of methane into the heat exchanger? 162 kg/min, What rate of heat is supplied to the methane stream in order to heat it from 35.0°C to 75.0°C? 250 kW
95.0 mL of H_2O is initially at room temperature (22 C). A chilled steel rod at 2 C is placed in the water. If the final temperature of the system is 21.4 C, what is the mass of the steel bar?
If the equilibrium concentration of Cd2+ ion is 1.5 X 10-6 M, calculate the equilibrium concentration of OH- in an aqueous equilibrium between solid Cd(OH)2 and its ions. (Ksp for Cd(OH)2 is 2.5 X 10-14)
Ammonia gas at 223°C and 90. atm flows into a reactor at a rate of 550. L/min. Carbon dioxide at 223°C and 47 atm flows into the reactor at a rate of 600. L/min. What mass of urea is produced per minute by this reaction assuming 100% yield?
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
Calculate the vapor pressure of water above a solution prepared by adding 23.5 g of lactose (C12H22O11)to 200.0g of water at 338K . (Vapor-pressure of water at 338K 187.5 torr.)
If 97.3 L of NO2 forms, measured at 35 C and 632 mm Hg, what is the percent yield?
The surface area of the nail is 8.59 cm. The density of the zinc is 7.13 g/cm3 how many zinc atoms are used in the coating?
Calculate the P-Cl bond energy, given the following reaction and the average bond dissociation energy of chlorine as 240kJ/mole.
A buffer solution contains 0.10 mol of acetic acid and 0.13 mol of sodium acetate in 1.00 L. (a) What is the pH of this buffer? (b) what is the pH of the buffer after the addition of 0.02 mol of KOH? (c) What is the pH of the buffer after the addi..
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