A student attempts to prepare a 3.50 percent by weight saline solution by dissolving 3.50 g NaCl in 100 g of water. Since equation 11.2 calls for 100 g of solution, the correct amount of solvent should have been 96.5 g water (100 - 3.5 = 96.5). What percent by weight solution did the student actually prepare? Click here to see the answer
(9.0K)
Seawater contains 30,113 ppm by weight dissolved sodium and chlorine ions. What is the percent by weight concentration of sodium chloride in seawater? Click here to see the answer
(17.0K)
How many mL of pure alcohol are in a single cocktail made with 50 mL of 40% vodka? (Note: "Proof" is twice the percent, so 80 proof is 40%.) Click here to see the answer
(15.0K)
If fish in a certain lake are reported to contain 5 ppm by weight DDT, (a) what percentage of the fish meat is DDT? (b) How much of this fish would have to be consumed to reach a poisoning accumulation of 17.0 grams of DDT? Click here to see the answer
(16.0K)
For each of the following reactants, draw a circle around the proton donor and a box around the proton acceptor. Label which acts as an acid and which acts as a base.
(a) HC2H3O2(aq) + H2O(l) → H3O+(aq) + C2H3O2-(aq) (b) C6H6NH2(l) + H2O(l) → C6H6NH3+(aq) + OH-(aq) (c) HClO4(aq) + HC2H3O2(aq) → H2C2H3O2+(aq) + ClO4-(aq) (d) H2O(l) + H2O(l) → H3O+(aq) + OH-(aq) Click here to see the answer
(40.0K)
Click here to see the answer
(9.0K)