step-by-step explanation: a reaction 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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Mathematics, 21.06.2019 18:30
Solve the system of equations y= 3/2 - 1, -x+ y =-3
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