Answer:
I believe it’s C
Explanation:
I used Socratic and found a quizlet lol
Answer:
A
Explanation:
The equation for this conversion is 
Mr is molar mass.
Answer:
They are oxoanions of chromium in the 6+ oxidation state and are moderately strong oxidizing agents. In an aqueous solution, chromate and dichromate ions can be interconvertible.
Chemical formula: CrO2−; 4 and Cr; 2O2−; 7
Conjugate acid: Chromic acid
Molar mass: 115.994 g mol−1 and 215.988 g mol−1