Copper and hydrogen con euch be formed by electrolysis, At which electrodes are these stoments formed?
copper
hydrogen
A
anode
anode
B
anode
cathode
cathode
anode
D
cathode
cathode
ОА, А

C.cathode, cathode

Explanation:

In electrolysis, a device called ELECTRODE, which electric current passes through is used. However, electrodes can either be anode or cathode depending on the charge. Anode is a positive electrode that attracts negative ions while cathode is a negative electrode that attracts positive ions.

According to this question, Copper (Cu) and hydrogen (H) which are both positive ions i.e. Cu2+ and H+ will move towards and form at the CATHODE. Hence, the answer is cathode, cathode for the respective element.

  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

snell's law

refractve index = sin incidence / sin refraction