C-14 is an isotope of the element carbon. how does it differ from the carbon atom seen here? a) c-14 has two more protons. b) c-14 has two more neutrons. c) c-14 has a larger atomic radius. d) c-14 has two additional valence electrons. this column of the periodic table represents the halogen family. this is a family of reactive elements. how do the members of the family differ? how are they alike? a) the mass numbers differ; they have the same number of protons and valence electrons. b) they have different atomic numbers and mass numbers; they have the same number of electrons. c) they have different atomic numbers and mass numbers; they have the same number of valence electrons. d) they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature. young stars, just beginning their life in the galaxy, would contain mostly a) carbon. b) helium. c) iron and nickel. d) hydrogen and helium.
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Chemistry, 22.06.2019 01:20, whrjegt4jrnfdvj
1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.
Answers: 2
Chemistry, 22.06.2019 04:50, shonnybenskin8
Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b
Answers: 1
Chemistry, 22.06.2019 14:40, neonbluefaith
Which statement best describes the function of enzymes?
Answers: 1
C-14 is an isotope of the element carbon. how does it differ from the carbon atom seen here? a) c-1...
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