A 12.49 g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition (definite proportions), how many grams of sodium does a 8.61 g sample of sodium bromide contain? On another planet, the isotopes of titanium have the given natural abundances. Abundance Mass (u) 74.900% 45.95263 18.800% 47.94795 6.300% 49.94479 Isotope 4611 g Na 4871 50Ti What is the average atomic mass of titanium on that planet? average atomic mass

A 12.49 g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition (definite proportions), how many grams of sodium does a 8.61 g sample of sodium bromide contain? On another planet, the isotopes of titanium have the given natural abundances. Abundance Mass (u) 74.900% 45.95263 18.800% 47.94795 6.300% 49.94479 Isotope 4611 g Na 4871 50Ti What is the average atomic mass of titanium on that planet? average atomic mass

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter4: Reactions In Aqueous Solution

Section: Chapter Questions

Problem 73QAP: Copper metal can reduce silver ions to metallic silver. The copper is oxidized to copper ions...

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A student set up an experiment for six different trials of the reaction between 1.00-M aqueous acetic acid, CH3COOH, and solid sodium hydrogen carbonate, NaHCO3. CH3COOH(aq) + NaHCO3(s) NaCH3CO2(aq) + CO2(g) + H2O() The volume of acetic acid was kept constant, but the mass of sodium bicarbonate increased with each trial. The results of the tests are shown in the figure. (a) In which trial(s) is the acetic acid the limiting reactant? (b) In which trial(s) is sodium bicarbonate the limiting reactant? (c) Explain your reasoning in parts (a) and (b).
Classify each of the following reactions as (1) a redox reaction (2) a nonredox reaction or (3) cant classify because of insufficient information. a. A combination reaction in which one reactant is an element b. A decomposition reaction in which the products are all elements c. A decomposition reaction in which one of the products is an element d. A displacement reaction in which both of the reactants are compounds
There are many ionic compounds that dissolve in water to a very small extent. One example is lead(II) chloride. When it dissolves an equilibrium is established between the solid salt and its component ions. Suppose you stir some solid PbCl2 into water. Explain how you would prove that the compound dissolves but to a small extent? Is the dissolving process product-favored or reactant-favored? pbcl2(s)pb2+(aq)+2cl(aq)
list at least three quantities that must be conserved in chemical reactions.
Nickel(II) sulfide, NiS, occurs naturally as the relatively rare mineral millerite. One of its occurrences is in meteorites. To analyze a mineral sample for the quantity of NiS, the sample is dissolved in nitric add to form a solution of Ni(NO3)2. NiS(s) + 4 HNO3(aq) Ni(NO3)2(aq) + 2 NO2(g) + 2 H2O(l) + S(s) The aqueous solution of Ni(NO3)2 is then reacted with the organic compound dimethylglyoxime (C4H8N2O2) to give the red solid Ni((C4H7N2O2)2. Ni(NO3)2(aq) + 2 (C4H8N2O2)(aq) Ni(C4H7N2O2)2 + 2 HNO3(aq) Suppose a 0.468-g sample containing millerite produces 0.206 g of red, solid Ni(C4H7N2O2)2 What is the mass percent of NiS in the sample?
n general terms, what are the spectator ions in a precipitation reaction? Why are the spectator ions not included in writing the net ionic equation for a precipitation reaction? Does this mean that the spectator ions do not have to be present in the solution?
4.65 Using the web, find out how lead “poisons” the catalyst in a catalytic converter.
Copper metal can reduce silver ions to metallic silver. The copper is oxidized to copper ions according to the reaction 2Ag+(aq)+Cu(s)Cu2+(aq)+2Ag(s)A copper strip with a mass of 2.00 g is dipped into a solution of AgNO3. After some time has elapsed, the copper strip is coated with silver. The strip is removed from the solution, dried, and weighed. The coated strip has a mass of 4.18 g. What are the masses of copper and silver metals in the strip? (Hint: Remember that the copper metal is being used up as silver metal forms.)
One method for determining the purity of aspirin (C9H8O4) is to hydrolyze it with NaOH solution and then to titrate the remaining NaOH. The reaction of aspirin with NaOH is as follows: A sample of aspirin with a mass of 1.427 g was boiled in 50.00 mL of 0.500 M NaOH. After the solution was cooled, it took 31.92 mL of 0.289 M HCl to titrate the excess NaOH. Calculate the purity of the aspirin. What indicator should be used for this titration? Why?