(1)Before the rod is brought near, the stream of water is uncharged. (2) When the positively charged rod is brought near the lower part of the stream, it attracts the negative (-) charges in the water and they shift a little closer to the rod. The plus ( ) charges stay where they are. (3) With the negative charges in the water closer to the rod, the attractive force between them and the positively charged rod is stronger than the repulsive force between the positive charges in the water and the rod. Thus, there is a net attractive force and the lower part of the water stream is attracted to the rod, and so the stream bends. How would you evaluate the written part of his explanation

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz

a. vertically

explanation:

i tried it and took the test

if im wrong then we have different tests