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A mixture of MgCO3 and CaCO3 was dissolved in HCl (1.64g of a mixture of calcium carbonate and magnesium carbonate was dissolved in 50ml of 0.8 M HCL) The excess of acid needed 16ml of 0.25M Naoh for neutralization. then calculate Calculate the percentage of calcium carbonate and magnesium carbonate?
A mixture of 3.0 g of 1,1-diphenylethylene and 100 mg of sulfuric acid was heated for 2 hours. Upon cooling, 2.2 grams of crystalline 1,1,3,3-tetraphenyl-3-methyl-1-butene precipitated from the mixture. What is the percent yield of the crystalline..
A 120g sample of an unknown substance was heated from 15oC to 30oC. The substance absorbed 458 joules of energy. What is the specific heat of this substance?
consider a .7 L of a buffer composed of 0.4 M HClO and 0.5 NaClO? How many moles of strong base could this buffer withstand?
The partial molar volumes of water and ethanol in a solution with x(H2O) = 0.40 at 25 degrees C are 16.9 and 57.5 cm^3/mol, respectively.
Solve an equilibrium problem (using an ICE table) to calculate the pH of each of the following solutions. 1) .12 M HF pH = ? 2) a mixture that is 0.12 M HF in and 0.12M in NaF. pH =?
Based on the data for step 2 of the experiment, predict what would happen if you performed step 3 of the experiment (how many sets of three drops of each of the HCl and NaOH would be needed until the buffering capacity is lost for the two solution..
Using your knowledge of chemistry, describe at least one method that could be used to remove lead(II) acetate from a sample of wine.
the vapor pressure of water is 17.5 mmHg at 20 degrees Celcius, and 355.1 mmHg at 80 Celcius. Calculate the boiling point of water at 760 mm Hg.
air is 21 mole percent oxygen that is 0.21 atm oxygen at 1 atm. suppose the ph of the water is 3.67 and that the
If 31.82 g of a metal oxide reacted with excess carbon and 4.08 L of CO2 formed at 100 C and 1.5 atm what is the identity of the metal
the corresponding sound. If you are 480.0 m from the explosion and the speed of sound is 340 m/s, calculate the distance traveled by the light during the brief delay required for the sound to reach
Cl2 is one of the seven diatomic elements H2SO4 is sulfuric acid and has the sulfate ion with neg 2 charge CH4 is a methane molecule is organic and covalent GeCl4 Germanium tetrachloride which is ionic
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