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 CaCl2 • 2H2O and NaH2PO4 • H2O.

1. NaCl

formula weight - 58,4 g/mol.

number of moles - 0,14 mol

mass - 58,4 g/mol · 0,14 mol = 8,176 g.

2. KCl

formula weight - 74,55 g/mol.

number of moles - 0,005 mol

mass - 0,372 g.

3. C₆H₁₂O₆

formula weight - 180,1 g/mol.

number of moles - 0,0056 mol

mass - 180,1g/mol · 0,0056 mol = 1,01 g.

4. NaHCO₃

formula weight - 84 g/mol.

number of moles - 0,0262 mol

mass - 2,2 g.

5. CaCl₂·H₂O

formula weight - 147 g/mol.

number of moles - 0,001 mol

mass - 0,15 g.

6. MgSO₄

formula weight - 120,3 g/mol.

number of moles - 0,0008 mol

mass - 0,096 g.

7. NaH₂PO₄·H₂O

formula weight - 138 g/mol.

number of moles - 0,001 mol

mass - 0,14 g.