(Test Bank) Chemistry in Context, American Chemical Society

Fahlman, 10

Chemistry

Test Bank

10th Edition

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Test Bank for Chemistry in Context, American Chemical Society, The downloadable file consists of 412 pages, and the total size of the file is 19.65 MB. Purchase now only for highly discounted price.

Author(s): Fahlman

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9/17/2020 Assignment Print View https://ezto.mheducation.com/hm.tpx 1/231. Award: 10.00 points 2. Award: 10.00 pointsThe quantity 0.0000064 g expressed in scientific notation. 6.4 × 106 g 6.4 × 10−6 g 6.4 × 107 g 6.4 × 10−7 g Negative powers of ten move the decimal to the left. The quantity 8.7 × 105 g expressed in standard decimal notation. 0.000087 g 870.000 g 0.0000087 g 870,000 g Positive powers of ten move the decimal to the right.         CHAPTER 19/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 2/23 3. Award: 10.00 points    4. Award: 10.00 points  A substance that can be brok en down into two or more simpler substances by chemical methods is called a(n) compound. mixture . element. isotope . Mixtures are separable by physical means. On a periodic table , the columns of elements with similar properties are periods. groups. rows. metals. Periods and rows go across.         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 3/23 5. Award: 10.00 points    6. Award: 10.00 points  The most numerous of the elements are the metals. nonmetals. metalloids. noble gases. These are green in the periodic table in your textbook. Which is not a mixture ? A jar filled with rocks and sand Seawater A glass of K ool-Aid Sodium chloride Mixtures include more than one pure substance .         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 4/23 7. Award: 10.00 points    8. Award: 10.00 points  Which is not a pure substance ? Helium Copper wire Air Sucrose Mixtures are not pure substances. Which squares contain mixtures ? II and III only III and IV only I, III, and IV only I and IV only Mixtures will have different substances in the same bo x.         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 5/23 9. Award: 10.00 points   Which square(s) contain(s) only an element? I only II only I and II only III and IV only Elements will only have one type of atom in the bo x.    9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 6/23 10. Award: 10.00 points   Which symbols represent only elements that are metals ? X and Z X and Q P and L X, R, P , and Q Nonmetals reside in the upper right corner of the periodic table .    9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 7/23 11. Award: 10.00 points    12. Award: 10.00 points  Which symbol(s) represent(s) elements in the noble gas family ? X and Z P and L Q Y Noble gases are in the far-right column of the periodic table . Which differentiates a compound from a mixture of two or more elements ? The elements in a compound may be present in varying proportions A compound does not exhibit the individual properties of the elements of which it is composed A compound is made up of only one element A compound cannot be made up of more than two elements Remember that compounds are elements bound together by chemical bonds.         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 8/23 13. Award: 10.00 points    14. Award: 10.00 points  Which substance is an element? NO2 NaCl N2 CH4 Only one has just one symbol in the formula. A(n) __________ is a fix ed number of atoms held together by chemical bonds in a certain spatial arrangement. element ion molecule mixture Remember which of these have more than one element that are also bonded together .         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 9/23 15. Award: 10.00 points   Which diagram(s) best represent(s) only diatomic molecules ? I only II only I and II only II and IV only The prefix di- means two .    9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 10/23 16. Award: 10.00 points   Which diagram(s) best represent(s) only molecules ? I only II only III only I and II only IV only Molecules have multiple atom bound together .     9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 11/23 17. Award: 10.00 points    18. Award: 10.00 points  Which diagram(s) best represent(s) only individual atoms ? I only II only III only IV only II and III only The atoms are not bound to other atoms. Which of the following is the chemical symbol for silver? Au Pb Ag Fe          9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 12/23 19. Award: 10.00 points    20. Award: 10.00 points  Which of the following is a pure substance ? Lemonade Concrete Gasoline Silver wire Remember that pure substances have only one component. Which square(s) contain(s) only one or more compounds ? I only II only I and IV only II and III only Different compounds will have different combinations of different elements.         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 13/23 21. Award: 10.00 points    22. Award: 10.00 points  In the periodic table , which elements typically have similar properties ? Those in the same rows Those related diagonally Those in the same columns Those on opposite sides Groups are those with similar properties. The nucleus of an atom contains electrons and protons only . protons only . electrons, protons, and neutrons. protons and neutrons only . Remember that the massive particles are in the nucleus while the electrons orbit around the outside .         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 14/23 23. Award: 10.00 points    24. Award: 10.00 points  What distinguishes the atoms of one element from another? The number of neutrons The number of protons plus neutrons The number of protons The number of neutrons plus electrons Remember that the number of protons is the atomic number and that defines who the element is. The atomic number is the same as the mass number of an atom. number of protons in a nucleus. number of protons and neutrons in a nucleus. number of neutrons in a nucleus. The protons define the element.         9/17/2020 Assignment Print V iew https://ezto.mheducation.com/hm.tpx 15/23 25. Award: 10.00 points    26. Award: 10.00 points  The majority of new smartphones being released have displays that are at least 5 inches in size . What is this size in centimeters ? (There are 2.54 cm in one inch.) 1.97 cm 6.10 cm 12.7 cm 60.0 cm One common class of minerals are aluminosilicates, with a general formula of Al 2SiO5. What is the atomic percentage composition of aluminum in an aluminosilicate ? 12.5 percent Al 25 percent Al 33.3 percent Al 62.5 percent Al         