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An aerosal spray can with volume of 450mL contains 4.0g of propane (C3H8) as propellant. Explain what is the pressure of the gas in the can at 28 degrees C?
Calculate the osmotic pressure of a 20% sucrose solution given that the molecular weight of sucrose is 342g.
ichromate solution is 0.0189 M dichromate, and it took 26.01 mL of your standard iron solution to titrate the excess dichromate in an unknown. What is the chemical oxygen demand of the sample, in units of mg O2/L?
A compound has a pKa of 7.4. To 100 mL of a 1.0M solution of this compound at pH 8 is added 30 mL of 1.0M HCl. what is the pH of the resulting solution?
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
what are the concentrations of rm a and rm b after seventy seconds if the initial concentration of rm ab is 0.230m and
calculate the molar mass of the acid. B. After 10.00 mL of base had been added during the titration, the pH was found to be 5.87. What is the Ka of the unknown acid
Sodium thisulfate, Na2S2O3, is used as a fixer when developing photographic film. What is the mass in grams of Na2S2O3 needed to make 100ml of a 0.25 solution?
The normal freezing point of water H2O is 0.00 oC and its Kf value is 1.86 oC/m. Assuming complete dissociation of the electrolyte,
Which of the following is TRUE with regards to strong and weak acids? A. weak acids undergo complete dissociation in solution B. strong acids undergo partial dissociation in solution C.
A 2.29 g sample of ascorbic acid is titrated with a 0.64 M red dye. What volume of red dye is required to reach the endpoint?
If the titrant has a molarity of 0.2000 M and there are 50.00 mL of analyte present, what is the molarity of the analyte?
If 20.g of NaCl are used, how many grams of H2SO4 are required for complete reaction? Using the balance equation 2NaCl(s)+ 1H2SO4(aq)= 2HCl(aq)+ 1Na2SO4
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