1. For an experiment, a biology student makes 1 liter of a solution containing the following substances, which are shown in the table below. Using the given information, fill in the missing parts of the table for each substance by (a) providing the formula weight and (b) calculating either the mass the student needs to weigh out or the number of moles that the student has, based on the amount weighed out. For each calculation, show your work. Be sure to include the formula mass of water for CaC12 • 2H2O and NaH2PO4 H2O. . Substance Mass (g) Answor NaCl KCI C6H12O6 NaHCO3 CaCl2 • 2H2O MgSO4 NaH2PO4 H2O Formula Weight (g/mol) Number of Moles 0.14 0.005 0.0262 0.0008 1.01 0.15 0.14

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".