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Calculate the molar mass of a compound from the following information. You find that the freezing point of benzene is 5.5 degrees C. You then dissolve 1.60g of the unknown compound in 22.82 mL of cyclohexane. The freezing point of the solution is found to be 2.8 degrees C. The freezing point depression constant for benzene is 4.3 degrees C/m. the density of benzene is 0.8765g/mL
What proportions of benzene and ethylbenzene should be mixed (a) by mole fraction (b) by mass in order to achieve the greatest entropy of mixing
Nitrogen is contained in a 300 ml vessel at 400 mm Hg and 10°C. How many grams of nitrogen are in the vessel?
Solid cupric nitrate as well as aqueous potassium hydroxide is combined with water in a test tube. A deep blue precipitate forms in the test tube. State a complete chemical reaction that accounts for the formation of the solid.
What is the solubility of calcium fluoride in a solution that contains 0.015 M calcium chloride? Note calcium chloride is completely soluble in water.
A compound that contains only C, H, and O is subjected to combustion analysis. A 0.3654 gram sample of this compound yields 1.0420 g CO2 and 0.2437 g H2O. If the substance has a molar mass of 216 g/mol, what is the molecular formula of the substan..
Potash is composed mainly of potassium caronate, K2CO3. If 1.000g of potash reacts with sulfuric acid to produce 145 mL of carbon dioxide gas at STP, what is the % of potassium carbonate in the marble sample
Water is unique because it is less dense as a solid than as a liquid. How can you account for this unusual attribute
Determine whether kinetic energy is being converted to potential energy, or vice versa, in the following process. a) Water cascades downward in a waterfall. b) Electrolysis of water produces H_2 and O_2.
What is the formula weight of KI? What quantity of KI is present in 301 mL of a 0.30 M solution?
Apamine is a small monomeric peptide toxin present in the venom of the honeybee. it has the sequence: CNCKAPETALCARRCQQH a)it is known that apamine does NOT react with iodoacetate. how many disulfide bonds are present?
In 30% surplus air methane combustion the adiabatic flame temperature is higher by at least 50 degrees when species dissociation is neglected.
what is the theoretical yield for the equation
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