I need help!
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 CaCl2  2H2O and NaH2PO4  H2O.

Question

I need help! 
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 CaCl2  2H2O and NaH2PO4  H2O.

anonymous · Answer

The first part is the one I am having trouble on.

anonymous · Answer

Welcome to Open Study! Do you know how to calculate moles and mass?

anonymous · Answer

@learning32112?

anonymous · Answer

You use this formula for your calculations $n=\dfrac{m}{M}$ for n is moles, m is mass and M is molar mass. Try rearranging the equation to find for M and m.

anonymous · Answer

Could you write out one for me? So I understand?

anonymous · Answer

I know how to find the molar mass, but except those 2 that I left blank. I don't understand what the black dot means?