1. chemistry

    Select all cases in which the units comprising the solid are best classified as ions? P4 Mg(ClO3)2 Ge Pb(NO3)2 Ag C2H4O2
  2. Chemistry

    Select all cases in which the units comprising the solid are best classified as molecules. ScBr3 Fe IF H2S IF5 Kr None
  3. chemistry

    Select all cases in which the units comprising the solid are best classified as individual atoms. C5H12 C3H6(propene) KBrO3 C3H8 AgNO3 C4H8(cyclobutane) None
  4. Chemistry

    Select all cases in which the units comprising the solid are best classified as molecules. CrSe C2H2 CS2 C2H4 Cs2S Cl2O7 None Help please? I think they're all molecules
  5. Chemistry

    Select all cases in which the attraction between units in the solid can best be classified as electrostatic bonding forces. CsBrO3 N2O3 Cr(OH)2 Ca3(AsO4)2 Rn Ar None
  6. Chemistry

    Select all cases in which the attraction between units in the solid can best be classified as electrostatic bonding forces. RbBr H2O2 HI MgI2 Na2O SiO2(quartz) None
  7. Chemistry

    Select all cases in which the attraction between units in the solid can best be classified as individual atom induced dipole forces. Y2O3 NH3 H2S ZnBr2 Cu KrF4 None I honestly do not know what to do. I know dipole dipole is positive and negative but this
  8. Chemistry

    In the experiment shown below, you add some salt to water. A = All of the solid dissolves (no solid at the bottom). B = You add more water and the solid stays dissolved. Select all of the following that are true about solutions A and B. The same number of
  9. chemistry

    Would flame tests be useful for detecting metal ions present in a mixture of metal ions? Explain. In some cases, yes. In most cases, no.
  10. Chemistry

    Which argument supports the claim that dissolving solid calcium chloride (CaCl2) in water is a chemical change? A. The ionic bond between the calcium ions and chloride ions is broken. B. The solid calcium chloride can be recovered by evaporating the water.
  11. math

    Note: Figure not drawn to scale If U = 4 units, V = 5 units, W = 7 units, X = 6 units, Y = 7 units, and Z = 4 units, what is the area of the object? Select answer A 49 square units Select answer B 43 square units Select answer C 71 square units Select
  12. Chem Help

    You are given several grams of solid sodium chloride and water and asked to make a solution. Explain what happpens on a molecular level as sodium chloride dissolves in the water. The solid (which is a network of ions) breaks apart, and the sodium ions are
  13. Chem

    Why does sodium chloride not conduct electricity as a solid but when melted, does conduct electricity? Thanks Solid NaCl consists of a three dimensional array of Na^+ and Cl^-. Even though the ions are present, the ions are not free to move about; i.e.,
  14. Chemistry (CHEM)

    Can someone explain the electrical conductivity of melted and of aqueous solutions of ionic compounds. An explain it using the characteristics of ionic compounds. ThankS A Whole lot.. In Advance I suggest you go to the site recommended by Ms.Sue. Here is a
  15. AP Chemistry

    Consider the following reaction: PbCl2 + 2 NaOH → Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2.
  16. chem

    How many moles of ions are there in .2 mol of lithium oxide? I need help again... Strictly speaking, Li2O is a solid and in that form it is not ionized. To get ions from it, you must dissolve it in water, and that causes it to decompose. Despite all that,
  17. Chemistry

    Consider the following reaction: PbCl2 + 2 NaOH -> Pb(OH)2 + 2 NaCl What would be the major species observed floating in solution after one mole of PbCl2 and 2 moles of NaOH are mixed in aqueous solution? 1. Na+ ions, Cl− ions and H+ ions 2. Pb2+
  18. Chemistry

    What changes of state are involved in this use of ethyl chloride? Select all that apply. Select all that apply. 1-liquid to gas 2-liquid to solid 3-gas to solid 4-liquid to solid 5-solid to liquid 6-solid to gas
  19. chemistry

    Write the formula of the ionic compound that forms between a. copper(I) ions and chloride ions---CuCl b. copper(II) ions and hydrogen sulfate ions--Cu(HSO4)2 c. lithium ions and iodide ions--LiI d. cobalt(III) ions and phosphate ions---CoPO4
  20. Chemistry

    In a sample of solid Al(NO3)3, the ratio of aluminum ions to nitrate ions is (1) 1:1 (2) 1:2 (3) 1:3 (4) 1:6
  21. chemistry need help

    Determine the number of moles of each specified atom or ion in the given samples of the following compounds.( Hint: the formula tells you how many atoms or ions are in each molecule of formula unit.) a. O atom in 3.161x10^21 molecules of CO2 b. C atom in
  22. chemistry

    Determine the number of moles of each specified atom or ion in the given samples of the following compounds.( Hint: the formula tells you how many atoms or ions are in each molecule of formula unit.) a. O atom in 3.161x10^21 molecules of CO2 b. C atom in
  23. Biology (Please Help!)

    When we spin around in one place and stop, we feel as though we are still moving. This feeling is caused by continued Select one: A. transmission of nerve impulses from cochlea to auditory nerve B. movement of fluid against cochlea C. vibrations of
  24. Biology

    When we spin around in one place and stop, we feel as though we are still moving. This feeling is caused by continued Select one: A. transmission of nerve impulses from cochlea to auditory nerve B. movement of fluid against cochlea C. vibrations of
  25. Math

    An electronics firm uses 600 cases of transistors each year. The cost of storing one case for a year is 90 cents, and the ordering fee is $30 per shipment. How many cases should the firm order each time to keep total cost at a minimum, assuming the
  26. SS Help

    1. The U.S. Constitution calls for how many branches of government? A. two B. three C. Four D. Five ????? 2. Which of the following responsibilities are held by the legislative, rather than the executive, branch? Select all that apply. A. writing and
  27. chem

    how do I figure out the molecular formula for The concentration of lead (II) ions in a sample of polluted water that also contains nitrate ions is determined by adding solid sodium sulfate.
  28. Chemistry

    In concentrated aqueous solutions of NaCl, the Na+ (aq) ions can be so close to the Cl- (aq) ions that a small percentage is associated in ion pairs at any given moment. Suppose that a solution contains 1.00 mol of NaCl and that 5.57% of the formula units
  29. Calculus I

    The base of a solid is the circle x^2 + y^2 = 9. Cross sections of the solid perpendicular to the x-axis are squares. What is the volume, in cubic units, of the solid?
  30. calc

    he base of a solid in the xy-plane is the circle x^2 + y^2 = 16. Cross sections of the solid perpendicular to the y-axis are semicircles. What is the volume, in cubic units, of the solid?
  31. Calculus

    The base of a solid is the circle x2 + y2 = 9. Cross sections of the solid perpendicular to the x-axis are semi-circles. What is the volume, in cubic units, of the solid?
  32. calculus

    The base of a solid is the circle x2 + y2 = 9. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid?
  33. SOCIAL STUDIES (CHECK ANSWERS) ASAP

    1. Which of the following responsibilities are held by the legislative, rather than the executive branch? Select two answers. A) writing and voting on new laws**** B) providing social programs to citizens C) selecting new judges for federal courts D)
  34. calc

    The base of a solid in the region bounded by the graphs of y = e^-x y = 0, and x = 0, and x = 1. Cross sections of the solid perpendicular to the x-axis are semicircles. What is the volume, in cubic units, of the solid?
  35. chemistry

    Some distilled water is added to an empty beaker. A gram of copper(II) nitrate is added to the beaker with stirring. After a few minutes, what is in the beaker? a. solid copper(II) nitrate and water b. nitrogen gas, copper atoms, electrons, and water c. a
  36. Physics

    In designing a velocity selector that uses uniform perpendicular electric and magnetic fields, you want to select positive ions of charge +5e that are traveling perpendicular to the fields at 8.75 km/s. The magnetic field availabe to you has a magnitude of
  37. math

    a rectangular solid has a volume of 640 cubic units. the width is 3 units more than the height and the length is 1 unit more than three times the height. find the dimensions of the solid.
  38. algebra

    a rectangular solid has a volume of 640 cubic units. the width is 3 units more than the height and the length is 1 unit more than three times the height. find the dimensions of the solid.
  39. SS

    1. The U.S. Constitution calls for how many branches of government? (1 point) two three*** four five 2. Which of the following responsibilities are held by the legislative, rather than the executive, branch? Select all that apply. (2 points) writing and
  40. calculus

    The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x2. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid?
  41. Calculus

    The base of a solid in the xy-plane is the circle x^2+y^2 = 16. Cross sections of the solid perpendicular to the y-axis are semicircles. What is the volume, in cubic units, of the solid? a. 128π/3 b. 512π/3 c. 32π/3 d. 2π/3
  42. chem

    Which shows the greatest metallic character? -Na -K -Rb -Cs Also, What ions are very important for the proper functioning of biologic systems such as nerves and muscles? --oxygen ions --nitride ions --alkali metal ions --alkaline earth metal ions
  43. Calculus

    The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x^2. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid? So I got 1/30 because (integral
  44. chemistry

    An aqueous solution is analyzed and found to contain potassium ions and sulfite ions. Write the equation for the dissolution of the salt that produced this solution. If the solution contains 0.600 mol of potassium ions, how many moles of
  45. Chemistry

    The elements 57 through 71 (Lanthanum and the Lanthanoids) all form Ln+3 ions in aqueous solution. These all have an electron configuration is [Xe]4fn, where n increases from zero to fourteen over the series from Lanthanum to Lutetium Select the two ions
  46. History

    Which of the following best describes the Framers’ intentions concerning the relationship between state and federal courts? A.Federal courts were to be the primary courts under the Constitution, hearing all important cases, i.e., felony criminal
  47. chem

    im studying for a test and i have no idea where to even start for this practice problem..?? a 0.15M(molarity im assuming)solution of BrCl2 contains.. a).15MBr2+ ions and .30M Cl- ions b).30MBr2+ ions and .15M Cl- ions c).15MBr2+ ions and .15M Cl- ions
  48. Science AP Chemistry

    It is necessary to add iodide ions to precipitate the lead(II) ions from 250 mL of 0.076 M Pb(NO3)2(aq). What minimum iodide ion concentration is required for the onset of PbI2 precipitation? The solubility product of PbI2 is 1.4 × 10−8 . Answer in
  49. science

    a desk is classified as a solid because it has a definite shape and volume at what???
  50. science

    YOUR DESK IS CLASSIFIED AS A SOLID BECAUSE IT HAS A DEFINITE SHAPE AND VOLUME AT?
  51. Social studies 7

    Homework Help: SS Help Posted by I like Cats on Thursday, October 6, 2016 at 12:47pm. 1. The U.S. Constitution calls for how many branches of government? A. two B. three •• C. Four D. Five 2. Which of the following responsibilities are held by the
  52. Organic Chemistry

    Which purpose does recrystallization serve? (Select all correct answers.) It is used to purify liquids. To separate unreacted solid starting materials from the solid target compound. To remove a solid from a liquid. It is used to purify solids. Improve the
  53. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the
  54. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the
  55. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the
  56. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the
  57. science

    your desk is classified as a solid because it has a definite shape and volume at__________________________.
  58. Physics

    In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the
  59. Calculus

    The base of a solid in the first quadrant of the xy plane is a right triangle bounded by the coordinate axes and the line x + y = 2. Cross sections of the solid perpendicular to the base are squares. What is the volume, in cubic units, of the solid?
  60. chemsitry

    What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions
  61. chem help ASAP!!!!

    What ions are very important for the proper fuctioning of biological systems such as nerves and cells? A)alkali earth metals B)hydrogen ions C)oxygen ions D)nitride ions E)alkali metal ions my choice is A or C can anyone help?
  62. Chemistry

    Identify all substances that can be classified as a molecular solid. Rn Zn(BrO3)2 TlNO3 La C2F4 C2F6 None
  63. Calculus

    The base of a solid is the circle x2 + y2 = 9. Cross sections of the solid perpendicular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid? 36 sqrt 3 36 18 sqrt 3 18 The answer isn't 18 sqrt 3 for sure.
  64. Calculus

    The base of a solid in the region bounded by the graphs of y = e^-x, y = 0, and x = 0, and x = 1. Cross sections of the solid perpendicular to the x-axis are semicircles. What is the volume, in cubic units, of the solid? Answers: 1)(pi/16)e^2
  65. Chemistry

    What is the volume of 0.129 M HCl(aq) re- quired to neutralize all of the hydroxide ions in 46 mL of 0.216 M KOH(aq)? Answer in units of mL. Answer: 77.0232 What is the molarity of Cl− ions at the stoichiometric point? Answer in units of mol/L. What
  66. Chemistry

    Identify all substances that can be classified as a network solid. SiCl4 Zr Fe2(SO4)3 SiH4 Co(NO3)2 Y None
  67. Chemistry

    Identify all substances that can be classified as an atomic solid. SeF6 C2H4O2 H2C2O4 S8 Ru La2(SO4)3 None
  68. chemistry

    What is an ionic solid? A. One positive ion and one negative ion bonded to form a solid B. Many nonmetal atoms bonded together to form a solid C. Many positive and negative ions bonded to form a solid D. Many metal atoms bonded together to form a solid I
  69. History

    How does the federal court system decide which criminal cases to take? A) they take cases that have already seen state courts B) a grand jury decides if each case has merit •• C) they take cases that are being appealed D) a Supreme Court justice
  70. statistics

    A quality supervisor for a factory that makes cell phone cases examines a sample of 46 cases. She finds that 8 cases are the wrong size. Which is the best prediction of the number of cases that will be the wrong size in a shipment of 3,000? A.)410 B.)475
  71. government

    the president's clemency powers apply only to a. criminal cases b. military cases c. impeachments d. federal cases a.
  72. Math

    The shipping department must send out 50 cases of footballs. Five stores will receive ten cases each. How many cases are left?
  73. math 12

    without looking at cases Jamie just puts the CDs into cases. The cases belong to the CDs. how many different ways can the CDs be put in the cases? Is the answer 3!=6
  74. College Chemistry

    The concentration of lead ions (Pb^2+) in a sample of polluted water that also contains nitrate ions (NO3) is determined by adding solid sodium sulfate (Na2SO4) to the sample of the water. Write the net ionic equation for the reaction. Do not forget to
  75. math

    Palmer Cheese Company is a small manufacturer of several different cheese products. One product is a cheese spread sold to retail outlets. Susan Palmer must decide how many cases of cheese spread to manufacture each month. The probability that demand will
  76. math

    Suppose y , the number of cases of a disease, is reduced by 11% per year. (a) If there are initially 10,000 cases, express y as a function of t , the number of years elapsed. (b) How many cases will there be 6 years from now? (c) How long does it take to
  77. College Chemistry

    Part a: What mass of solid CuCL2 is required to prepare 450.0mL of 0.125M CuCl2 solution?? Part B: What are the concentrations of Cu +2 ions and Cl- ions in the above solutions. I understand part a, and got the right answer. i need help understanding part
  78. stat

    A sample of comprising 150 members is required from a population comprising 5000 members. It is known that the population falls into three categories made up of 1500 members in category A, 3000 members in category B, and 500 members in category C. Explain
  79. Chemistry

    Can someone please check my answers for me for the following questions. THANK YOU! 1) An ion with an oxidation number of 3+ can combine with three other ions, if each of these ions has an oxidation number of....3- 2) The correct formula for nickel(II)
  80. Statistics

    Episodes of dehydration are common at outdoors music festivals. At a particular large annual event, a first aid team has recorded over the years 85 cases on average per day. In 2018, during a weekend they observe 78, 86, 79, and 81 cases. Assuming the
  81. Statistics

    Episodes of dehydration are common at outdoors music festivals. At a particular large annual event, a first aid team has recorded over the years 85 cases on average per day. In 2018, during a weekend they observe 78, 86, 79, and 81 cases. Assuming the
  82. chemistry

    a) calculate the concentration of your unknown (Gatorade) using correct units Note if you did not run the Gatorade use absorbance =0.205 abs units in order to calculate the concentration of the dye in the Gatorade b) calculate of % T for an absorbance of
  83. Chemistry

    Describe the ammonium ion, NH4+, and the sulfate ion, SO42-. What compounds would these ions form with potassium and fluoride ions? Write the formula units for the resulting compounds.
  84. chem

    how do you know which halide salts confirms a presence of F- ions, Cl- ions, Br- ions, and I- ions?
  85. chemistry

    how do you know which halide salts confirms a presence of F- ions, Cl- ions, Br- ions, and I- ions?
  86. Chemistry

    There are _______ oxygen ions in 1 mole of Na2O. A. 6.0 x 10^23 O2 ions B. 1.2 x 10^24 O2 ions C. 3.0 x 10^23 ions D. None of these
  87. Chemistry

    What is an ionic solid? A. One positive ion and one negative ion bonded to form a solid B. Many nonmetal atoms bonded together to form a solid C. Many positive and negative ions bonded to form a solid D. Many metal atoms bonded together to form a solid I
  88. SS

    how does the federal court system decide which criminal cases to take? A) they take cases that have already seen state courts B)A grand jury decides if each state has merit C)they take cases that are being appealed D)a supreme court justice decides which
  89. AP Calculus

    The base of a solid is bounded by y =|x|+a, 0<a<3, and the line y=3. find in cu. units in terms of a, the volume of the solid if every cross section perpendicular to the y-axis is an equilateral triangle.
  90. AP Calc

    The base of a solid is bounded by y=|x|+a, <a<, and the line y=3. Find, in Cu. units in terms of a, the volume of the solid if every cross section perpendicular to the y-axis is an equilateral triangle.
  91. CHECK my answers Physical science

    1. which of the following should be classified as a suspension? A. soda** B. sand in water C. glass D. milk 2. Which of the following is an of example of a chemical property? A. density B. flammability C. hardness** D. melting point 3. Which state of
  92. chemistry

    How do you compare and contrast a chemical equation and an ionic equation? Is a chemical equation any equation while an ionic equation deals with the gain/loss of electrons? A chemical equation usually consists of what I call a molecular equation whereas
  93. chemistry

    Does an insoluble solid dissociate into ions? Is the reaction reversible? Will an equilibrium reaction form when a chemical reaction forms an insoluble solid? Why, or why not?
  94. Chemistry PLEASE HELP!

    Manganese dioxide reacts with bromide ions to form manganese ions and bromate ions in an acidic aqueous solution. Write the balanced equation for this reaction. Select one: a. Br- + MnO2 + 3H2O Mn2+ + BrO3- + 2H3O+ b. Br- + 3MnO2 + 6H3O+ 3Mn2+ + 9H2O +
  95. Chemistry

    1.) Explain the similarity between Mg(OH)2 and Zn(OH)2 in particular why would any insoluble hydroxide tend to dissolve in an acidic solution? Are they both bases? 2.) Explain the difference in particular how does Mg^+2 appear to form complex ions with
  96. Chem AP!!! please help!!!!

    Select all that follow the trends of lattice energy: BaO > KF 1. Fluorine is more electronegative than oxygen. 2. The ions in BaO are +2 and -2; whereas in KF they are +1 and -1. 3. The atomic radii of Ba and O are smaller than those of K and F. 4. The
  97. Computer

    Computers are classified into Four areas, please explain how they are classified?
  98. physics

    Consider a mass spectrometer like the one shown in the figure. A beam of singly charged positive ions is accelerated from an ion source and injected into a velocity selector with an electric field of E=2700V/m) and magnetic field of B=43.0mT. The ions then
  99. Chemistry

    A solution may conain the ions Ba^2+, Ag^+, and Cu2+. Add sodium chloride and get a white predipitate. The supernatant is decanted, potassium sulfate solution is added to the supernatant and no reaction is observed. Add sodium hydroxide and get a blue
  100. Chemistry

    A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work. I think a) is 2.26 is that correct?