Chemistry, 25.09.2019 02:30 arnold2619
Which of these statements best describes the relationship between elements, compunds, and pure substances?
a. pure substances can be divided into two groups: elements and compounds
b. compunds can be divided into two groups: pure substances and elements
c. elements and pure substances are two of many different types of compounds
d. pure substances and compounds are two of many different types of elements
you
Answers: 1
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Afamily is one another name for a group on the table of elements.
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When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.
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If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?
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Which of these statements best describes the relationship between elements, compunds, and pure subst...
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