(4 points) Ethylene diamine tetra-acetic acid (EDTA, C10N2O3H16 ) is a water-soluble chemical that readily combines with metals, such as calcium, magnesium, and iron to prevent them from precipitating as solids. One EDTA molecule associates with one metal atom. A factory produces an aqueous waster that contains 20mg/L calcium and collects the waste in 44-gallon drums. What mass of EDTA would need to be added to each drum to completely associate all of the calcium the barrel