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At what temperature will a solution of 8.27 g CaCl2 in 45.0 g H2O begin to freeze? Assume complete dissociation of CaCl2. (The freezing point depression constant for water is -1.86 °C/m).
A sample of gas confined in a 2.0L container at 930 Torr and 25oC was heated to 45oC. What was the final pressure?
The critical constants of ethane are Pc = 48.20 atm, Vc = 148 (cm^3)/mol, and Tc = 305.4 K. Calculate the van der Waals parameters of the gas, and estimate the radius of the molecules.
You need to prepare 100.0 mL of of buffer solution of pH=4.00 using 0.10M benzoic acid (pKa=4.20) and 0.160M sodium benzoate. What is the volume of each solution needed to prepare this buffer?
57.0 mL of 3.50 M sodium hydroxide is combined with 35.0 mL of 1.80 M magnesium chloride. What mass in grams of solid forms?
Find out the Celsius temperature of 2.49 mol of gas contained in a 1.00 L vessel at 1.8 atm pressure.
What is the flask's volume?
What is the rate constant? what would happen if you increase the concentration of NO by a factor of 1.9?
Draw both extended and Fischer representation of each of these compounds.
What fraction of thiocyanate ion is accually converted into the complex ion?
Assuming the structures above gave molecular ion abundances of 12, 70, and 23(dexchlorpheniramine, 9-aminoacridine and pilocarpine, respectively), what abundances would you expect for the M+1 and the M+2 peaks for each structure?
How many moles of H+ ions are present in 1.9 L of 0.48 M hydrobromic acid.
An industrial chemist studying bleaching and sterilizing prepares a hypochlorite buffer using 0.150 M HClO and 0.150 M NaClO. (Ka for HClO = 2.9x10^-8.)
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