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A sheet of aluminum foil has a total mass of 1.000ft2 and a mass of 3.745g. What is the thickness of the foil in millimeters? (Density of Al = 2.699 g/cm3.)
What is the molarity of C6H12O6 in an aqueous solution that is prepared by dissolving a 20.95 g sample of impure C6H12O6 in water to make 1,450 mL of solution.
Calculate the molarity and mole fraction of acetone in a 1.26 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add.
What is the heat change of a 25 g block of iron that starts at a temperature of 22 degrees C and increases to 79 degrees C?
Describe how you would construct your target electrochemical cell, including the identities and concentrations of all chemical species, as well as a diagram of the setup.
During a recrystallization a student takes 1g of a white (colorless) solid and adds 5 mL of acetone. He heats the mixture in a boiling water bath and adds another
We could find out more information about ths reaction by studying the temperature dependence of the rate constant, k. These same experiments could be carried out at a lower temperature (ice bath) and a second rate constant, k2 could be determined ..
What is the mass change (in grams) accompanying the formation of CO and H2 in the water gas reaction?
Describe the apparent relationship between H3O and OH concentrations when an endpoint is reach in acid-base titration.
Why does the pH of the blood decrease in a person who has digested tremetol? Answer A. Lactic acid build up decreases blood pH B. Hydrogens pumped by the electron transport chain decrease blood pH C.
Suppose that 24 g of each of the following substances is initially at 25.0^circ C. What is the final temperature of each substance upon absorbing 2.45 kJ of heat?
A reagent bottle on the shelf labeled 0.5 M NaCl was used in place of the 0.5 M CaCl2. Assuming C2O42- to be in excess, what would be observed as a result of using this reagent in this test
stock solution of Bovine Serum Albumin (BSA), diagram the most accurate procedure so you end up with at least 500 uL each of 5 ug/uL
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