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In one experiment, a student added a total of 15.00 mL of 0.5241 M HCl to 1.4881 g to of an unknown which contained CaCO3 (molar mass = 100.09 g/mol). The resulting solution required 12.21 mL of 0.1211 M NaOH to back titrate the excess HCl. What was the percent CaCO3 in the unknown? Report your answer to two (2) decimal places.
Alpha-linolenic acid is one of a large group of fatty acids that are found in fish oil, walnuts and canola seeds. These nutrients are essential for good health. All of these fatty acids consist of an unsaturated hydrocarbon that is terminated by a..
Rank the solutions from the highest to lowest pH.
How many different aldols (b-hydroxyaldehydes), including constitutional isomers and stereoisomers,
A flask contains 0.330 mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask.
What are the equilibrium partial pressures of CO and CO2 if CO is the only gas present initially, at a partial pressure of 0.872 atm?
Ethanol (C2H5OH) is produced from the fermentation of sucrose in the presence of enzymes. C12H22O11(aq) + H2O(g) > 4 C2H5OH(l) + 4 CO2(g)
A gas system has initial volume and temperature of 8160mL and 467.0K. If the temperature changes to -151C, what will the resultant volume be in mL
Calculate the molar concentration of ferrocyanide in a solution of 0.031 M ZnSO4 saturated with Zn2Fe(CN)6. ZnSO4 will be completely dissociated into Zn2+ and SO42-
The products of the fusion are carbon-13 and a proton. a) Write a nuclear reaction for this process. b) How much energy is released when 1.00 g of B-10 is fused with alpha particles?
The standard enthalpy of formation of SiH4(g) is +34.3 kJ. The standard enthalpy of formation reaction is below. Si(s) + 2 H2(g) SiH4(g) What is the enthalpy change for the following reaction?
In the laboratory a student finds that it takes 33.1 Joules to increase the temperature of 11.5 grams of solid lead from 20.3 to 39.9 degrees Celsius.
Determine the amount of (NH4)2SO4 in g consumed in a fermentation medium in which the final cell concentration is 40 g/L in a 500 L medium volume
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