A supply of chemicals; chemical A weighs 646 grams/liter and also chemical B weighs 1128 gram/liter. You can not use the pure form of the chemicals however there are two mixtures. Mixture H contains 20% Chemical A and 80% Chemical B by volume. Mixture L contains 80% of chemical A and 20% of chemical B. How much of each mixture. H and L must be used to make ten liters of a mixture which is 50% A and 50%B by weight?