Use the equation 2cu+o2 —> 2cuo to find how many grams of copper react to form 3.64 mol cuo.

231.31 g

We are given;

2Cu+O2 → 2CuO

We are required to determine the mass of copper that would react.

2 moles of Cu reacts with 1 mole of oxygen to yield 2 moles of CuO

Moles of Cu = moles of CuO

Thus, moles of Cu = 3.64 moles

But, Mass = Number of moles × atomic mass

Atomic mass of copper = 63.546

Thus,

Mass of Cu = 3.64 moles × 63.546 g/mol

                   = 231.31 g

Thus, 231.31 g of copper will react to produce 3.64 moles of CuO

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.