Law of Conservation of mass lab

I was only here to get part A done. 

1. mass of apparatus befor mixing, trile 1, trile 2, trile 3

                                                4.248 g, 5.059 g, 4.317 g

2. observation on mixting, trile 1, trile 2, trile 3

                                    4.250 g, 5.052 g, 4.301 g