Answer:
72.45 mmol K⁺ and 36.225 mmol Cr₂O₇²⁻
Explanation:
It is possible to obtain millimoles of a substantce by the multiplication of molarity times milliliters of the solution.
In the solution that is 0.0750M K₂Cr₂O₇:
K⁺ = 0.0750M * 2 = 0.150M
Cr₂O₇²⁻ = 0.0750M
The millimoles of these ions are:
Millimoles K⁺:
483mL * 0.150M = 72.45 mmol K⁺
Millimoles Cr₂O₇²⁻:
483mL * 0.075M = 36.225 mmol Cr₂O₇²⁻
