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A 0.375 gram sample of impure BaCl2?2H2O is titrated with 0.100M AgNO3, requiring 28.44 mL. Calculate (a) the percent BaCl2?2H2O in the sample and (b) the percent Cl- in the sample.
Fluoride (F-) is toxic element (anion) that can be lethal at 0.20 g/70kg of body weight. But because F- at low levels (1ppm) aids in healthy teeth, municipal water sources normally add this level of fluoride.
sample of MgO was dissolved in 85.00g of 1 M HCl assume that no heat was absorbed by the walls of the calorimeter and the specific heat of the hydrochloric acid solution is 3.64
Which attactive force(s) must be overcome in order to boil liquid ammonia, NH3. dispersion forces. ion-ion forces. hydrogen bonds. ion-dipole forces. covalent bonds
A stream of air (21% O2 m, the rest N2) flowing at a rate of 10.0 kg/h is to be mixed with a stream of CO2 inside a mixer. The CO2 enters the mixer at a rate of 20.0 m/h at 150 ?C and 1.5 bar. What is the mole percent of CO2 in the product stream
Calculate the solubility of O2 in water at a partial pressure of O2 of 120 torr at 25 Degrees celsius. The Henry's law constant for O2 is 1.3 X 10^-3 mol/L X atm for Henry's law in the form C=kP, where C is the gas concentration (mol/L)
Ascorbic acid (Vitamin C, H2C6H6O6) is a diprotic acid. In a laboratory exercise, a vitamin C tablet was analyzed by titration using 0.125 M NaOH(aq). On the average, it required 29.5 mL of the base to neutralize the acid in the one tablet. How ma..
The chloride in the sample was precipitated by the addition of 47.8 mL of a silver nitrate solution. What is the concentration of the silver nitrate solution?
Suppose a volume is divided into three equal parts. How many microstates exist for distributing four molecules among the three parts?
Determine the heat of combustion of ethyl alcohol (C_2 H_6 O). How much ethyl alcohol must be burned to generate enough heat to warm exactly one liter of water from 60 degrees faranheit to 180 degrees faranheit
A 1.00 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCl. The Ka for HF is 3.5E-4
An electric power station annually burns 3.3 107 kg of coal containing 1.4 percent sulfur by mass. Calculate the volume of SO2 emitted at STP
You are an EH&S professional returning home from your plant on a summer Friday afternoon at about 4 p.m. You have just picked up some materials from a nearby building supply store for a weekend backyard project
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