An unknown compound contains 14.00% copper, 31.76% carbon, 4.89% hydrogen, and the rest is oxygen. Given that the unknown compound has an empirical formula of CuC₁₂H₂₂O₁₄, and that gluconate (C₆H₁₁O₇⁻) is a common ligand for copper, determine the oxidation state of copper in the compound.

An experiment is conducted to see if cats preferred skim milk or 2% milk. a cup of skim milkwas put out for 5 kittens and then measured how much the kittens drank over the course of aday. following a cup of 2% milk was purout for the skittens and then masured how much thekittens drank over the course of a day. the same kittens were used and the milk was served atthe same temperature. it was discovered that the cats liked the 2% milk more than the skimmilk. what is the dependent variable in this experiment?