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Concept explainers
(a)
Interpretation:
Hot tea has to be classified as a pure substance or a mixture.
Concept Introduction:
Matter can be classified into two type’s namely pure substance and mixture.
Pure substance: A single component that has a constant composition, irrespective of the
Example: Water, sugar etc.
Mixture: A mixture consists of more than one substance and the composition of a mixture is dependent on the sample. The separation of mixture into its components can be done by physical changes.
(b)
Interpretation:
Beach sand has to be classified as a pure substance or a mixture.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
Carbon dioxide has to be classified as a pure substance or a mixture.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
Cement has to be classified as a pure substance or a mixture.
Concept Introduction:
Refer to part (a).
(e)
Interpretation:
Zinc has to be classified as a pure substance or a mixture.
Concept Introduction:
Refer to part (a).
(f)
Interpretation:
Vinegar has to be classified as a pure substance or a mixture.
Concept Introduction:
Refer to part (a).
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Chapter 3 Solutions
FOUND.OF COLLEGE CHEMISTRY
- Which of the following is a molecular compound? (a)NaCl (b) NaOH (c) FePO4 (d) LiF (e) H2Oarrow_forwardIdentify each of the diagrams shown here as an elementor a compound.arrow_forwardWhich of the following are pure substances? Explain. (a) Calcium chloride, used to melt ice on roads, consists of two elements, calcium and chlorine, in a fixed mass ratio. (b) Sulfur consists of sulfur atoms combined into octatomic molecules. (c) Baking powder, a leavening agent, contains 26% to 30% sodium hydrogen carbonate and 30% to 35% calcium dihydrogen phosphate by mass. (d) Cytosine, a component of DNA, consists of H, C, N, and O atoms bonded in a specific arrangement.arrow_forward
- Most abundant metal on the surface of the earth:(a) Iron(b) Aluminium(c) Calcium(d) Sodiumarrow_forwardYou are given a hammer, a battery, a bulb, wires and switch.(a) How could you use them to distinguish between samples of metals and non- metals?(b) Asses the usefulness of these tests in distinguishing between metals and non-metals?arrow_forwardGive the names of appropriate element for (a)~(d) in the passages below. (1) (a) and (b) are elements that belong to period 5 and 6 in the periodic table, respectively. Both simple substances are solid under room temperature. To an aqueous solution containing cations of (a) and (b), dilute hydrochloric acid was dropped to produce white precipitate. Upon rinsing with boiling water, the precipitate was partially dissolved. (2) Both (c) and (d) are elements that produce stable trivalent cations in an aqueous solution. To an aqueous solution containing (c) and (d) as trivalent cations, aqueous ammonia was dropped to produce a gel-like precipitate. Upon the addition of concentrated aqueous sodium hydroxide, the precipitate was partially dissolved and the majority of (c ) was transferred to the supernatant.arrow_forward
- Suggest physical changes by which the followingmixtures can be separated.(a) iron filings and wood chips(b) ground glass and sucrose (cane sugar)(c) water and olive oil(d) gold flakes and waterarrow_forwardWhich compound of calcium is used for swimming pool water and sewage treatment? (A) Calcium hydroxide, Ca(OH)2 (B) Calcium hypochlorite, Ca(OCl)2 (C) Calcium carbonate, CaCO3 (D) Calcium oxide, CaOarrow_forwardA 1.30 g sample of titanium chemically combines with chlorine gas to form 5.16 g of titanium chloride. (a) What is the empirical formula of titanium chloride? (b) What is the percent by mass of titanium and the percent by mass of chloride in the sample?arrow_forward
- QUESTION 1 questions. Just give the answer only. Make sure that your answers are carefully numbered. Give short answers to each of the following questions. Do not copy the (a) A homogeneous mixture which contains water as a solvent is called (b) Ni(CIO4)2·6H2O is hydrated whereas Ni(CIO4)2 is (c) NaCl contains an bond whereas O2(g) contains a bond (d) A homogeneous mixture has a and composition (e) Temperature is an because it does not depend on the amount of substance (f) The maximum number of electrons that an orbital can have is (g) The energy of the lowest level in the H atom is (h) Arrange the following subshells in the H atom in order of increasing energy: 3s 4d 2р 4f 3d 2s 3p (i) Wavelength and frequency of radiation have an relationship (i) In an atom, what is the maximum number of electrons that can have the following set of quantum numbers? n = 4 , m = -1 , ms = +½ (k) Draw a 3dx2- orbital and describe it in your own words. (1) Write the ground state electron configuration…arrow_forwardQUESTION 1 questions. Just give the answer only. Make sure that your answers are carefully numbered. Give short answers to each of the following questions. Do not copy the (a) A homogeneous mixture which contains water as a solvent is called (b) Ni(CIO4)2-6H2O is hydrated whereas Ni(CIO4)2 is (c) Nacl contains an bond whereas O2(g) contains a bond (d) A homogeneous mixture has a and composition (e) Temperature is an, because it does not depend on the amount of substance (f) The maximum number of electrons that an orbital can have is (g) The energy of the lowest level in the H atom is (h) Arrange the following subshells in the H atom in order of increasing energy: 3s 4d 2p 41 3d 2s 3p (i) Wavelength and frequency of, radiation have an relationship (i) In an atom, what is the maximum number of electrons that can have the following set of quantum numbers? n = 4, m =-1, m, = +% (k) Draw a 3d2 orbital and describe it in your own words. (1) Write the ground state electron configuration for…arrow_forwardSelect the best answer or answers from the choices given: Which of the following does not describe a mixture? (a) properties of its components are retained, (b) chemical bonds are formed, (c) components can be separated physically, (d) includes both heterogeneous and homogeneous examples.arrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoIntroductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage LearningLiving By Chemistry: First Edition TextbookChemistryISBN:9781559539418Author:Angelica StacyPublisher:MAC HIGHER
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