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Help please! How much of each starting material would you use to prepare 2.00 L of each of the following solutions?
(a) 0.210 M NaOH from solid NaOH

(b) 0.260 M NaOH from 1.00 M NaOH stock solution

(c) 0.300 M K2CrO4 from solid K2CrO4

(d) 0.220 M K2CrO4 from 1.75 M K2CrO4 stock solution

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