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Calculate the minimum pH needed to precipitate Mn(OH)2 so completely that the concentration of Mn2+ is less than 1 Microgram per liter [1 part per billion ()].
How many liters of flouridated drinking water would a 70 kg person have to consume in one day to reach this toxic level? How many kg of sodium flouride would be needed to treat a 7.49x 10^6 -gal reservior?
A calorimeter contains 27.0 g of water at 11.0 C. When 2.10 g of X (a substance with a molar mass of 80.0 g) is added, it dissolves via the reaction
What is the latent heat of vaporization Tsat in kJ/mol? (Answers are 1366 kW and 28.4 kJ/mol) Please show work for good rating.
Consider the titration of a 24.0 ml sample of 0.120 M HC2H3O2 with 0.105 M NaOH. Determine the initial pH.
if you started a ride with ice packs that held 1300 g of frozen water at 0 rmcircc and the temperature of the water at
What is the percent ionization of a solution prepared by dissolving 0.0223 mol of chloroacetic acid, HC2H2O2Cl) in 1.80 L of water?
Choose the element with more negative (more exothermic) electron affinity from each of the following pairs.
0.01m hcl reacts with 3.18 g na2co3. here 50 ml of hcl is required for the reaction. calculate the volume of co2
a student gently drops an object weighing 15.8 g into an open vessel that is full of ethanol so that a volume of
what is the minimum amount of NaCl needed to get the 18.2 degrees? Its a molality equation
A sample weighing 3.183 g is a mixture of Fe2O3 (molar mass = 159.69) and Al2O3 (molar mass = 101.96). When heat and a stream of H2 gas is applied to the sample
calculate the increase in entropy when 3.50 mol of monatomic perfect gas with cp 52 r is heatednbsp from 250 k to 700
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