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The addition of 28.0g of a compound to 750g of CCl4 lowered the freezing point of the solvent by 5.40 K . Calculate the molar mass of the compound.
How many milliliters of 0.02 N standard versenate solution would be required in the API titration for total hardness? b) Express the concentrations of Ca2+ and Mg2+ in parts per million
Dissolve a compound with a molecular mass of 272.05 in a 10-mL volumetric flask. You remove a 1.00-mL aliquot, place it in a 25-mL volumetric flask and dilute it to the mark.
30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
Calculate the pH of the buffer after the addition of 1.5 g of HCl (36.5 g/mol). (Ka of HNO2 = 7.1x10^-4.)
A 10.0 balloon contains gas at a pressure of 640 torr. What is the new pressure of the gas at the 22.0 liters volumes if there is no change in temperature.
Draw and exlpain using representation of molecular orbitals the structure and bonding found in ethane; indicate clearly the structure
Find the volume of a molar solution and What volume of a 2.00 molar solution of sulfuric acid, H 2 SO 4 , is required to react with 250.0g of magnesium carbonate, MgCO 3 , according to the following equation?
What is the partial pressure of each gas and total pressure of the mixture of gaases, in atmospheres, in the container?
What is the mass of silver bromide AgBr precipatated from 2.96 g of iron (III) bromide FeBr3 ? FeBr3 + AgNO3 = AgBr + Fe(NO3)3.
The simplest carbene known is methylene. The non-bonded electrons can be paired (singlet methylene) or unpaired (triplet methylene).
How many mL of a .244 M HCL solution will react with .0235 mole of MgO? The reaction of MgO and HCl is given below.
KEtones also undergo the aldo condensation, although a succesful reaction often requires "enhanced" conditions, since the addition involves an unfavorable equilibrium constant.
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