A 0.125g sample of gypsum was titrated to determine the percentage of calcium carbonate with 50 mL of 0.2M HCl. percentage of calcium carbonate was titrated with 50mL of 0.2M HCl. The excess HCl was titrated with 32.12 mL of 0.25M NAOH. Calculate the percent percent calcium carbonate in the gypsum sample.

answerspecific gravity;

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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