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Analytical Process
Giving examples, explain what inter-laboratory comparisons are and how they help maintain and enhance the quality of analysis.
(100 marks)
how much energy in kilojoules is required to change 47.6 g of ice at 0 degrees celcius to liquid water at the same temperature in kilocalories?
The mass of the flask (before the sample is placed into the flask) is measured when the outside of the flask is wet. However, the outside of the flask is dried before its mass is measured.
Problem- A solution contains 1.0x10^-3 M Cd+2 and Fe+2 ions that has a pH of 1.70. If the solution is saturated with H2S will either or both of these ions precipitate. Calculate the concentration of either of both ions remaining in solution. pKsp ..
What is the isotopic difference (in per mil) at 25degrees between gas, liquid, and solid phase for the elements carbon and sulfur. Show calculations
calculate the theroretical yield of c2h5cl when 123 g of c2h6 reacts with 220 g of cl2 assuming that c2h6 and cl2 react
c3h8g5o2g gt 3co2g4h2g og in the combustion of 250g of propane with an excess of hydrogen what volume of carbon
Compounds in a and b were named incorrectly. On a sheet of paper draw the molecule that fits the given description. From the structure you drew determine the correct IUPAC name. Write the correct IUPAC name in the blank.
Draw the products of 2-chloro-2-methylpropane and potassium hydroxide in acetone indicate what is going into and out of the plane and ALL products
Predict the relative reaction times with ethanolic AgNO3 for the following compounds and rank them from fastest to slowest: 2-chloro-2-butene, 1-chloro-2-butene, 2-chlorobutane.
Find the percentage of FeCl2 in a 35.5g sample of ore which has been dissolved in aqueous acid and titrated to the endpoint with 23.55 ml of 0.309 M Cr2O7^2- . the molar mass of FeCl2 is 126.0 g/mol. Cr2O7^2- + Fe^2+ ------> Cr^3+ + Fe^3+
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original mixture
What is the conversion calculation for M to grams of KBr for the following: What mass of potassium bromide is contained in 135 mL of 0.251 M Kbr solution
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