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Patients undergoing an upper GI tract lab test are typically givenan X-ray contrast agent that aids with the radiologic imaging ofthe anatomy. One such contrast agent is sodium diatrizoate (NaDTZ),a non-volatile water-soluble ionic compound. A 0.378 m solution isprepared by dissolving 38.4 g of NaDTZ in 160. mL of water at 31.2C (the density of water at 31.2 C is 0.995 g/mL). What is the molarmass of NaDTZ? What is the vapor pressure of this solution if thevapor pressure of pure water at 31.2 C is 34.1 torr?
How many moles of urea (60g/mol) must be dissolved in 71.6g of water to give a 2.4m solution
the value of kf for cyclohexane is 20.0degcm and its normal freezing point is 6.6degc. a mass of 1.604 g of a waxy
These two substances reach thermal equilibrium at a temperature of 64.2 degree celsius. If the specific heat capacity of substance "B" is 1.17 J / g-C, what is the specific heat of substance "A". (assume no heat is lost to the surroundings)
Rank these elements according to first ionization energy (highest to lowest) : Ne, F, O, N, C, B, Be, Li. HINT: There is a general trend for ionization energy within a period of the periodic table
A rock contains 0.42 mg of Pb-206 and 0.53 mg of U-238. Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for 238U-->206Pb is 4.5x10^9 yr.
a sample of propanec3h8 contains 10.8 moles of carbon atoms. how many total moles of atoms does the sample
A solution contains 0.37 M Ni(NO3)2 and 0.37 M Cu(NO3)2. Can the metal ions be separated by slowly adding Na2CO3? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and..
Oxygen and sulfur combine to form a variety of different sulfur oxides. some are stable molecules and some, including S2O2 and S2O3
Explain why the elimination reaction in acetone promotes an E2 mechanism while water promotes and E1 mechanism? Which product is more thermodynamically stable, the E or Z isomer?
what is the freezing point in c the solutions below? for water kf1.86 ckgmol. the vapor pressure of water at 45.0 c is
Some athletes have as little as 3.00 body fat. If such a person has a body mass of 45.0 , how many of body fat does that person have
A student titrated 25.00 mL of 0.1014M HCL solution with an NaOH solution of unknown concentration.
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