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A liquid solution of formaldehyde is 37.0% pure. This solution has a specific gravity of 1.037. The molecular weight of
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one tryoy ounce of gold is worth 380.00. There are 33.8 grams per troy ounce. you have a stock colloidal solution of a ver fine gold dust. It's concentration is .10%. From this solution 1.0ml is placed in 9.0ml of an isotonic, pH buffered solution to make
