chemistry

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A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 400 of a solution that has a concentration of ions of 1.20 ?

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CHM 1045, huh?? I'd like to know too!

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How many grams of \rm Na_3PO_4 will be needed to produce 450 mL of a solution that has a concentration of \rm Na^+ ions of 1.50 \it M?

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