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1.10 g of an unknown compound reduces the freezing point of 75.22 g benzene from 5.53 to 4.92 C.
What is the molar mass of the compound?
Express your answer to two significant figures and include the appropriate units
Which of the following compounds is soluble in water ? A) BaSO4
What mass of Au is produced when 18.6 ampere of current are passed through a gold solution for 29.0 minutes.
The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.30 mol of NaC2H3O2 in enough water to make 1.50 L of solution. Its pH was measured as 4.50 on a meter.
Use net ion equations to show how ammonium chloride (NH4Cl) is acidic and sodium acetate
given the equation 2C2H6(g)+7O2(g)->4CO2(g)+6H20(g) How many grams of oxygen are needed to react with 4.00 moles of C2H6?
which of these is true about the following reaction?
How much limestone must be decomposed by heating to produce 250.0 grams of lime, CaO?assuming that the limestone contains 95.0% pure CaCO3.
If a diagnostic test starts with 15mCi of Ga-68, how much is left after the test if the test runs for 2 hr and 15 minutes?
16.2g iron(III) chloride reacts with 3.33g NH2OH in acid to produced N2O gas. a) Write a balanced, net ionic equation.
Treatment of this disaccharide with alpha mannosidase yields D-mannose and D-glucose. Draw the structure of the trisaccharide and state its systematic name.
A voltaic cell consists of a strip of cadmium metal in a solution of Cd(NO3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a NaCl solution
What is the pH at the equivalence point? (Kb of NH3 = 1.8 A 20.0 mL sample of 0.20 M sodium acetate is titrated with 0.11 M HCl(aq). What is the pH after the addition of 50.0 mL HCl(aq)?
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