The number of protons in the nucleus of an atom determines the species of the atom, i. e., the element to which the atom belongs. an atom has the same number of protons and neutrons. but the electron number cannot be used instead because electrons are not within the nucleus electrons are negatively charged electrons can be removed from or added to an atom electrons are lighter than protons
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Chemistry, 22.06.2019 14:40
Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate โ enzyme-substrate complex (b) enzyme + substrate โโโ enzyme + products (c) enzyme + substrate โโโ enzyme-substrate complex โ enzyme + products (d) enzyme + substrate โโโ enzyme-substrate complex โ enzyme-substrate complex + products
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Chemistry, 22.06.2019 17:10
)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 ยฐc the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 ยฐc.
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Chemistry, 22.06.2019 22:30
Calculate the concentration of all species in a 0.165 m solution of h2co3.
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The number of protons in the nucleus of an atom determines the species of the atom, i. e., the eleme...
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