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Ascorbic acid is titrated with 23.1 mL of 0.5 M KIO3. How many moles of ascorbic acid are present?
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more complicated, but this is a reasonable first approximation.)
Compute the pH of a solution made by mixing eighty grams of NaCH3COO, to 39 grams of CH3COOH, and adding in H2O to produce 500. mL of solution.
Small samples of oxygen gas needed in the laboratory can be generated by any number of simple chemical reactions, such as 2KClO3(s) 2 KCl(s) + 3 O2(g) According to this balanced chemical equation, how many moles of oxygen gas are produced from the..
A total of 0.155 of this subunit was dissolved in enough water to produce 2.00 of solution. At 28 the osmotic pressure produced by the solution was 0.138 . What is the molar mass of the protein?
A 1-ft-diameter cylinder is closed on one end and fitted with a moveable piston on the other. With 1 atm applied pressure, the piston is located 20 ft from the closed end
Suppose a student is measuring the optical rotation of a 1 M sample of (S)-(-)- Limonene. The path length is 13cm. What optical rotation should the student expect to measure?
If 30.0 grams of sulfuric acide react with 25.0 g of aluminum hydroxide, identify the limiting reactant.
Calculate the mass of oxygen (in mg) dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air to be 0.21
water for the temperature of the trapped gas, will the calculated mass percent of metal in the sample be greater than, less than, or equal to real mass percent?
Which statement best desrcibes the energy change as bonds are formed and broken in this reaction ?
Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent? answer in % molality? answer in mol/kg
Then the potential of the mercury cathode was adjusted to -1.80 V vs. SCE, and the quantity of electricity passed during this second electrolysis was 64.17 cou- lombs. Calculate the weight percentages of CCl4 and CHCl3 in the original sample.
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