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Explain what mass of CaCO3 are needed to generate 200mL of CO2 at 22.5 degrees C and 745torr, as per to the reaction below?
CaCO3(s) + 2HCl(aq) <-- --> CaCl2(aq) + H2O(l)
A chemist wanted to determine the concentration of a solution of lactic acid, HC3H5O3. She found that the pH of the solution was 2.49. What was the concentration of the solution
What ratio [CH3NH3+]/[CH3NH2] is needed to prepare a buffer solution with a pH of 8.60 from methylamine, CH3NH2, and methylammonium chloride, CH3NH3Cl? Kb of CH3NH2 = 3.7 10-4.
how many milliliters of a salt solution with a density of 1.8 gml are needed to provide 400. g of salt
How many grams of ethylene glycol (C2H6O2) must be added to 1.20 kg of water to produce a solution that freezes at -5.76 C
Copper (II) oxide can be reduced to copper metal by heating in a stream of hydrogen gas:CuO(s) +H2(g) -heat--> Cu(s) +H2O(g)
The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7 kj?mol.
Magnesium metal is used as a sacrificial anode to reduce the corrosion of underground storage tanks (made of iron, more accurately steel). As a result the sacrifical metal corrodes instead of iron. Explain
If A solution containing 27.55 mg of an unknown protein per 25.0 mL of solution was found to have an osmotic pressure of 3.22 torr at 25.0oC. Explain what the molar mass of the protein
If you dilute 33.4 mL of a 3.5 M solution to make 244.0 mL of solution, what is the molarity of the dilute solution.
a 0.8612 g sample of a mixture consisting of nabr nai and nano3 was analyzed by adding agno3 to precipitate the br
you performed these reactions in an acidic solution diluting with 0.1m hno3. this is because iron forms an insoluble
A flask contains 0.190 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
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