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I need to make 100 mL of 0.4 wt% phosphoric, 0 2 wt% chronic acid, 99.4...

I need to make 100 mL of 0.4 wt% phosphoric, 0 2 wt% chronic acid, 99.4 wt% deionized water solution. I have our chromic acid pellets and 85% phosphoric acid. I know this phosphoric acid does not have a density of 1g/ml because I weighed 40 ml of it to be 70 some grams.

How much grams of chromic acid and 85% phosphoric acid do I need to weigh out in order to make this solution?

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