Three molecules of type a, three of type b, three of type c, and three of type d are to be linked together to form a chain molecule. one such chain molecule is abcdabcdabcd, and another is bcddaaabdbcc. (a) how many such chain molecules are there? [hint: if the three a's were distinguishable from one another— a1, a2, a3— and the b's, c's, and d's were also, how many molecules would there be? how is this number reduced when the subscripts are removed from the a's? ]
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One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.
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When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.
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Three molecules of type a, three of type b, three of type c, and three of type d are to be linked to...
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