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a.) Calculate the molar mass of unknown "x" if: 1.60 g of unknown "x" dissolved in 100.0of cyclohexane produces a freezing point of -5.1 degree celsius (cyclohexane has a freezing point = 3.9 degree celsius and the molal freezing point constant is 18.0).b.) How many mL of unknown "X" (density = 0.79 g/mL) needs to be dissolved in 50.0 g of water (Kb=0.512) to make the boiling point of the resulting solution to be 104.5 degree celsius if when unknown "X" dissolves in water to form 3 moles of ions for every mole of unknown "X"?
Order the following compounds according to their expected lattice energies- LiBr, CaO, MgBr2, AlBr3
a 0.4 kg aluminum part increases its temperature by 25 degrees celsius. how much thermal energy is transfered to the part by heat?
A piece of a newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24.0C, what is the specific heat capacity of this material?
suppose you titrate a 25 ml sample of vinegar with 17.62 ml of a standardized 0.1045 n solution of naoh. what is the
Cyclopropane gas is 85.7 % C and 14.3 % C H by mass and has a density of 1.71 g/L at 755 mm Hg and 25C. a) What is the molar mass of cyclopropane. b) What is the chemical formula for cyclopropane
Calculate the degrees of unsaturation in a compound with the molecular formula C3H6 and draw two possible structures, including hydrogen atoms, for the formula.
what is the reduced mass of benzene. THe atomic masses of C and H are 12.00 and 1, respectively.
The 20 mL of water added to the Erlenmeyer flask is to be previously boiled, deionized water. Since water does absorb CO2 from the atmosphere and since CO2 dissolved in water causes it to be slightly acidic,
Find the pH of the equivalence points and the volume of 0.0372 M NaOH needed to reach it in titrations of 28.9 mL of 0.0850 M H2SO3
terephthalic acid used in plastics manufacture contains only c h and o. combustion of 19.81 mg of terephthalic acid
Give equations to show how sulfuric acid can convert 4-methyl cyclohexene into a mixture of four isomeric c7H12 compounds(including starting material). Predict the relative amounts of each isomer.
Silver chloride, often used in silver plating, contains 75.27% . what is the mass of silver chloride required to plate 285 of pure silver
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