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Chemistry, 23.06.2019 04:31
Areaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:
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Chemistry, 23.06.2019 06:30
Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.
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Chemistry, 23.06.2019 08:50
Why are enzymes important to cells? they bring about chemical reactions. they provide structural support. they form the two layers of membranes. they store large quantities of energy.
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Chemistry, 23.06.2019 10:00
What is the density, d, of a substance with a volume of v = 12.5 cm3 and a mass of m = 74.4 g ?
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Agaseous mixture made from 37.14 g n2, 34.4 g c2h2, and 38.25 g of co is placed in a 33.53 l vessel...
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