{"id":1185,"date":"2021-02-15T21:49:16","date_gmt":"2021-02-15T21:49:16","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/?post_type=chapter&p=1185"},"modified":"2021-02-15T23:02:13","modified_gmt":"2021-02-15T23:02:13","slug":"check-your-learning-self-test-2","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/chapter\/check-your-learning-self-test-2\/","title":{"raw":"Check your learning: self-test","rendered":"Check your learning: self-test"},"content":{"raw":"
    \r\n \t
  1. Write a balanced equation for the decomposition of ammonium nitrate to form molecular nitrogen, molecular oxygen, and water. (Hint: Balance oxygen last, since it is present in more than one molecule on the right side of the equation.)[reveal-answer q=\"267993\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"267993\"][latex]2{\\text{NH}}_{4}{\\text{NO}}_{3}\\rightarrow 2{\\text{N}}_{2}+{\\text{O}}_{2}+4{\\text{H}}_{2}\\text{O}[\/latex][\/hidden-answer]<\/li>\r\n \t
  2. Acetaminophen, C8<\/sub>H9<\/sub>NO2<\/sub>, is a covalent compound and the active ingredient in several popular nonprescription pain medications, such as Tylenol. What is the molecular mass (amu) for this compound?[reveal-answer q=\"409467\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"409467\"]151.16 amu[\/hidden-answer]<\/li>\r\n \t
  3. Calcium phosphate, Ca3<\/sub>(PO4<\/sub>)2<\/sub>, is an ionic compound and a common anti-caking agent added to food products. What is the formula mass (amu) of calcium phosphate?[reveal-answer q=\"953796\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"953796\"]310.18 amu[\/hidden-answer]<\/li>\r\n \t
  4. Beryllium is a light metal used to fabricate transparent X-ray windows for medical imaging instruments. How many moles of Be are in a thin-foil window weighing 3.24 g?[reveal-answer q=\"27674\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"27674\"]0.360 mol[\/hidden-answer]<\/li>\r\n \t
  5. What is the mass of 2.561 mol of gold?[reveal-answer q=\"363301\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"363301\"]504.4 g[\/hidden-answer]<\/li>\r\n \t
  6. A prospector panning for gold in a river collects 15.00 g of pure gold. How many Au atoms are in this quantity of gold?\r\n[reveal-answer q=\"619266\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"619266\"][latex]4.586\\times {10}^{22}\\text{Au atoms}[\/latex][\/hidden-answer]<\/li>\r\n \t
  7. How many moles of sucrose, C12<\/sub>H22<\/sub>O11<\/sub>, are in a 25-g sample of sucrose?[reveal-answer q=\"442280\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"442280\"]0.073 mol[\/hidden-answer]<\/li>\r\n \t
  8. What is the mass of 0.443 mol of hydrazine, N2<\/sub>H4<\/sub>?[reveal-answer q=\"604947\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"604947\"]14.2 g[\/hidden-answer]<\/li>\r\n \t
  9. How many C4<\/sub>H10<\/sub> molecules are contained in 9.213 g of this compound? How many hydrogen atoms?[reveal-answer q=\"891154\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"891154\"][latex]9.545\\times {10}^{22}\\text{molecules }{\\text{C}}_{4}{\\text{H}}_{10}\\text{; }9.545\\times {10}^{23}\\text{ atoms H}[\/latex][\/hidden-answer]<\/li>\r\n \t
  10. How many moles of Ca(OH)2<\/sub> are required to react with 1.36 mol of H3<\/sub>PO4<\/sub> to produce Ca3<\/sub>(PO4<\/sub>)2<\/sub> according to the equation [latex]3\\text{Ca}{\\text{(}\\text{OH}\\text{)}}_{2}+2{\\text{H}}_{3}{\\text{PO}}_{4}\\rightarrow{\\text{Ca}}_{3}{\\text{(}{\\text{PO}}_{4}\\text{)}}_{2}+6{\\text{H}}_{2}\\text{O}[\/latex]?[reveal-answer q=\"105281\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"105281\"]2.04 mol[\/hidden-answer]<\/li>\r\n \t
  11. many NH3<\/sub> molecules are produced by the reaction of 4.0 mol of Ca(OH)2<\/sub> according to the following equation:\r\n

    [latex]{\\text{(}{\\text{NH}}_{4}\\text{)}}_{2}{\\text{SO}}_{4}+\\text{Ca}{\\text{(}\\text{OH}\\text{)}}_{2}\\rightarrow 2{\\text{NH}}_{3}+{\\text{CaSO}}_{4}+2{\\text{H}}_{2}\\text{O.}[\/latex]<\/p>\r\n[reveal-answer q=\"488302\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"488302\"]4.8 \u00d7 1024<\/sup> NH3<\/sub> molecules[\/hidden-answer]<\/li>\r\n \t

  12. What mass of gallium oxide, Ga2<\/sub>O3<\/sub>, can be prepared from 29.0 g of gallium metal? The equation for the reaction is [latex]4\\text{Ga}+3{\\text{O}}_{2}\\rightarrow 2{\\text{Ga}}_{2}{\\text{O}}_{3}\\text{.}[\/latex][reveal-answer q=\"24015\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"24015\"]39.0 g[\/hidden-answer]<\/li>\r\n \t
  13. What mass of CO is required to react with 25.13 g of Fe2<\/sub>O3<\/sub> according to the equation [latex]{\\text{Fe}}_{2}{\\text{O}}_{3}+3\\text{CO}\\rightarrow 2\\text{Fe}+3{\\text{CO}}_{2}?[\/latex][reveal-answer q=\"459310\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"459310\"]13.22 g[\/hidden-answer]<\/li>\r\n \t
  14. A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81 g Cl. What is this compound\u2019s percent composition?[reveal-answer q=\"39718\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"39718\"]12.1% C, 16.1% O, 71.8% Cl[\/hidden-answer]<\/li>\r\n \t
  15. To three significant digits, what is the mass percentage of iron in the compound Fe2<\/sub>O3<\/sub>?[reveal-answer q=\"992530\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"992530\"]69.9% Fe[\/hidden-answer]<\/li>\r\n \t
  16. What is the empirical formula of a compound if a sample contains 0.130 g of nitrogen and 0.370 g of oxygen?\r\n[reveal-answer q=\"961821\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"961821\"]N2<\/sub>O5<\/sub>[\/hidden-answer]<\/li>\r\n \t
  17. What is the empirical formula of a compound containing 40.0% C, 6.71% H, and 53.28% O?[reveal-answer q=\"381880\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"381880\"]CH2<\/sub>O[\/hidden-answer]<\/li>\r\n \t
  18. What is the molecular formula of a compound with a percent composition of 49.47% C, 5.201% H, 28.84% N, and 16.48% O, and a molecular mass of 194.2 amu?\r\n[reveal-answer q=\"509990\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"509990\"]C8<\/sub>H10<\/sub>N4<\/sub>O2<\/sub>[\/hidden-answer]<\/li>\r\n \t
  19. \r\n

    How many moles of Al2<\/sub>O3<\/sub>\u00a0will be produced when 23.9 g of H2<\/sub>O are reacted according to this chemical equation?<\/p>\r\n[latex]2AlCl_3 + 3H_2O(\u2113) \u2192 Al_2O_3 + 6HCl(g)[\/latex]\r\n\r\n[reveal-answer q=\"293168\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"293168\"][latex]0.442 mol[\/latex][\/hidden-answer<\/li>\r\n \t

  20. \r\n

    How many grams of N2<\/sub>\u00a0are needed to produce 2.17 mol of NH3<\/sub>\u00a0when reacted according to this chemical equation?<\/p>\r\n[latex]N_2(g) + 3H_2(g) \u2192 2NH_3(g)[\/latex]\r\n\r\n[reveal-answer q=\"30409\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"30409\"]30.4 g (Note: here we go from a product to a reactant, showing that mole-mass problems can begin and end with any substance in the chemical equation.)[\/hidden-answer]<\/li>\r\n \t

  21. \r\n

    What mass of H2<\/sub>\u00a0will be produced when 122 g of Zn are reacted?<\/p>\r\n[latex]Zn(s)+2HCl(aq)\u2192ZnCl_2(aq)+H_2(g)[\/latex]<\/span><\/span>\r\n\r\n[reveal-answer q=\"641758\"]Show Answer[\/reveal-answer]\r\n[hidden-answer a=\"641758\"]3.77 g[\/hidden-answer]<\/li>\r\n<\/ol>","rendered":"

      \n
    1. Write a balanced equation for the decomposition of ammonium nitrate to form molecular nitrogen, molecular oxygen, and water. (Hint: Balance oxygen last, since it is present in more than one molecule on the right side of the equation.)\n
      Show Answer<\/span><\/p>\n
      [latex]2{\\text{NH}}_{4}{\\text{NO}}_{3}\\rightarrow 2{\\text{N}}_{2}+{\\text{O}}_{2}+4{\\text{H}}_{2}\\text{O}[\/latex]<\/div>\n<\/div>\n<\/li>\n
    2. Acetaminophen, C8<\/sub>H9<\/sub>NO2<\/sub>, is a covalent compound and the active ingredient in several popular nonprescription pain medications, such as Tylenol. What is the molecular mass (amu) for this compound?\n
      Show Answer<\/span><\/p>\n
      151.16 amu<\/div>\n<\/div>\n<\/li>\n
    3. Calcium phosphate, Ca3<\/sub>(PO4<\/sub>)2<\/sub>, is an ionic compound and a common anti-caking agent added to food products. What is the formula mass (amu) of calcium phosphate?\n
      Show Answer<\/span><\/p>\n
      310.18 amu<\/div>\n<\/div>\n<\/li>\n
    4. Beryllium is a light metal used to fabricate transparent X-ray windows for medical imaging instruments. How many moles of Be are in a thin-foil window weighing 3.24 g?\n
      Show Answer<\/span><\/p>\n
      0.360 mol<\/div>\n<\/div>\n<\/li>\n
    5. What is the mass of 2.561 mol of gold?\n
      Show Answer<\/span><\/p>\n
      504.4 g<\/div>\n<\/div>\n<\/li>\n
    6. A prospector panning for gold in a river collects 15.00 g of pure gold. How many Au atoms are in this quantity of gold?\n
      Show Answer<\/span><\/p>\n
      [latex]4.586\\times {10}^{22}\\text{Au atoms}[\/latex]<\/div>\n<\/div>\n<\/li>\n
    7. How many moles of sucrose, C12<\/sub>H22<\/sub>O11<\/sub>, are in a 25-g sample of sucrose?\n
      Show Answer<\/span><\/p>\n
      0.073 mol<\/div>\n<\/div>\n<\/li>\n
    8. What is the mass of 0.443 mol of hydrazine, N2<\/sub>H4<\/sub>?\n
      Show Answer<\/span><\/p>\n
      14.2 g<\/div>\n<\/div>\n<\/li>\n
    9. How many C4<\/sub>H10<\/sub> molecules are contained in 9.213 g of this compound? How many hydrogen atoms?\n
      Show Answer<\/span><\/p>\n
      [latex]9.545\\times {10}^{22}\\text{molecules }{\\text{C}}_{4}{\\text{H}}_{10}\\text{; }9.545\\times {10}^{23}\\text{ atoms H}[\/latex]<\/div>\n<\/div>\n<\/li>\n
    10. How many moles of Ca(OH)2<\/sub> are required to react with 1.36 mol of H3<\/sub>PO4<\/sub> to produce Ca3<\/sub>(PO4<\/sub>)2<\/sub> according to the equation [latex]3\\text{Ca}{\\text{(}\\text{OH}\\text{)}}_{2}+2{\\text{H}}_{3}{\\text{PO}}_{4}\\rightarrow{\\text{Ca}}_{3}{\\text{(}{\\text{PO}}_{4}\\text{)}}_{2}+6{\\text{H}}_{2}\\text{O}[\/latex]?\n
      Show Answer<\/span><\/p>\n
      2.04 mol<\/div>\n<\/div>\n<\/li>\n
    11. many NH3<\/sub> molecules are produced by the reaction of 4.0 mol of Ca(OH)2<\/sub> according to the following equation:\n

      [latex]{\\text{(}{\\text{NH}}_{4}\\text{)}}_{2}{\\text{SO}}_{4}+\\text{Ca}{\\text{(}\\text{OH}\\text{)}}_{2}\\rightarrow 2{\\text{NH}}_{3}+{\\text{CaSO}}_{4}+2{\\text{H}}_{2}\\text{O.}[\/latex]<\/p>\n

      Show Answer<\/span><\/p>\n
      4.8 \u00d7 1024<\/sup> NH3<\/sub> molecules<\/div>\n<\/div>\n<\/li>\n
    12. What mass of gallium oxide, Ga2<\/sub>O3<\/sub>, can be prepared from 29.0 g of gallium metal? The equation for the reaction is [latex]4\\text{Ga}+3{\\text{O}}_{2}\\rightarrow 2{\\text{Ga}}_{2}{\\text{O}}_{3}\\text{.}[\/latex]\n
      Show Answer<\/span><\/p>\n
      39.0 g<\/div>\n<\/div>\n<\/li>\n
    13. What mass of CO is required to react with 25.13 g of Fe2<\/sub>O3<\/sub> according to the equation [latex]{\\text{Fe}}_{2}{\\text{O}}_{3}+3\\text{CO}\\rightarrow 2\\text{Fe}+3{\\text{CO}}_{2}?[\/latex]\n
      Show Answer<\/span><\/p>\n
      13.22 g<\/div>\n<\/div>\n<\/li>\n
    14. A 24.81-g sample of a gaseous compound containing only carbon, oxygen, and chlorine is determined to contain 3.01 g C, 4.00 g O, and 17.81 g Cl. What is this compound\u2019s percent composition?\n
      Show Answer<\/span><\/p>\n
      12.1% C, 16.1% O, 71.8% Cl<\/div>\n<\/div>\n<\/li>\n
    15. To three significant digits, what is the mass percentage of iron in the compound Fe2<\/sub>O3<\/sub>?\n
      Show Answer<\/span><\/p>\n
      69.9% Fe<\/div>\n<\/div>\n<\/li>\n
    16. What is the empirical formula of a compound if a sample contains 0.130 g of nitrogen and 0.370 g of oxygen?\n
      Show Answer<\/span><\/p>\n
      N2<\/sub>O5<\/sub><\/div>\n<\/div>\n<\/li>\n
    17. What is the empirical formula of a compound containing 40.0% C, 6.71% H, and 53.28% O?\n
      Show Answer<\/span><\/p>\n
      CH2<\/sub>O<\/div>\n<\/div>\n<\/li>\n
    18. What is the molecular formula of a compound with a percent composition of 49.47% C, 5.201% H, 28.84% N, and 16.48% O, and a molecular mass of 194.2 amu?\n
      Show Answer<\/span><\/p>\n
      C8<\/sub>H10<\/sub>N4<\/sub>O2<\/sub><\/div>\n<\/div>\n<\/li>\n
    19. \n

      How many moles of Al2<\/sub>O3<\/sub>\u00a0will be produced when 23.9 g of H2<\/sub>O are reacted according to this chemical equation?<\/p>\n

      [latex]2AlCl_3 + 3H_2O(\u2113) \u2192 Al_2O_3 + 6HCl(g)[\/latex]<\/p>\n

      Show Answer<\/span><\/p>\n
      [latex]0.442 mol[\/latex][\/hidden-answer<\/li>\n
    20. \n

      How many grams of N2<\/sub>\u00a0are needed to produce 2.17 mol of NH3<\/sub>\u00a0when reacted according to this chemical equation?<\/p>\n

      [latex]N_2(g) + 3H_2(g) \u2192 2NH_3(g)[\/latex]<\/p>\n

      Show Answer<\/span><\/p>\n
      <\/div>\n<\/div>\n

      30.4 g (Note: here we go from a product to a reactant, showing that mole-mass problems can begin and end with any substance in the chemical equation.)<\/p><\/div>\n<\/div>\n<\/li>\n

    21. \n

      What mass of H2<\/sub>\u00a0will be produced when 122 g of Zn are reacted?<\/p>\n

      [latex]Zn(s)+2HCl(aq)\u2192ZnCl_2(aq)+H_2(g)[\/latex]<\/span><\/span><\/p>\n

      Show Answer<\/span><\/p>\n
      3.77 g<\/div>\n<\/div>\n<\/li>\n<\/ol>\n","protected":false},"author":359083,"menu_order":6,"template":"","meta":{"_candela_citation":"[]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-1185","chapter","type-chapter","status-publish","hentry"],"part":799,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/chapters\/1185","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/wp\/v2\/users\/359083"}],"version-history":[{"count":24,"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/chapters\/1185\/revisions"}],"predecessor-version":[{"id":1241,"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/chapters\/1185\/revisions\/1241"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/parts\/799"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/chapters\/1185\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/wp\/v2\/media?parent=1185"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/pressbooks\/v2\/chapter-type?post=1185"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/wp\/v2\/contributor?post=1185"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/suny-dutchess-introbio2\/wp-json\/wp\/v2\/license?post=1185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}