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A 26 mL sample of a solution of MgF2 was diluted with water to 75 mL. A 25 mL sample of the dilute solution was found to contain 0.04 moles of F-. What was the concentration of MgF2 in the original undiluted solution
What is the molarity of a sodium hydroxide solution if 25.0 mL of this solution reacts exactly with 22.30 mL of 0.253 M sulfuric acid?
A 20.0 mL sample of gastric juice was taken from a patient suspected of having hypochloridia (low stomach acid). The sample was taken several hours after a meal so there was no ingested food or drink
what mass of oxalic acid dihydrate, H2C2O4 + 2H2O is required to prepare 280.0 ml of a 1.51 M solution of oxalic acid
When 9.00 grams of Al react with an excess of H3PO4, 30.0 grams of ALPO4 are produced.What is the percentage yeild of this reaction.
An insulated tank contains half liquid and half vapor by volume in equilibrium. The release of a small quantity of vapor without the addition of heat will cause
Under what conditions of pressure and temperature do real gases most closely approximate ideal-gas behavior?
The reaction of 1-methyl-1,3-cyclohexadiene with HBr can produce two distinct products. Give the structure of the two products and explain why each one is formed.
Calculate the number of moles and molality of the solution prepared by dissolving 4.00g of NaOH in 250.0g of water.
The pH of the resulting solution is 2.65. Calculate the Ka for the acid.
The normal boiling point of bromine is 58.8°C. Given that the vapor pressure of methanol is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.
If I have 2.4 moles of gas held at a temperature of 97 C and in a container with a volume of 45 liters, what is the pressure of the gas
The entropy of sublimation of a certain compound is 7.2 J / K mol at its normal sublimation point of 76 C. Calculate the vapour pressure in torr of the compound at 28 C.
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