Two sources of copper are cuprite, which has the iupac name copper(i) oxide, and malachite, which has the formula cu2co3(oh)2. copper is used in home wiring and electric motors because it has good electrical conductivity. other uses of copper not related to its electrical conductivity include coins, plumbing, roofing, and cooking pans. aluminum is also used for cooking pans. at room temperature, the electrical conductivity of a copper wire is 1.6 times greater than an aluminum wire with the same length and cross-sectional area. at room temperature, the heat conductivity of copper is 1.8 times greater than the heat conductivity of aluminum. at stp, the density of copper is 3.3 times greater than the density of aluminum. identify one physical property of aluminum that could make it a better choice than copper for a cooking pan.

See explanation below

Explanation:

This is a four part question, however, I will answer only the question you are asking which is, the property of aluminum that could make a better choice over than copper for a cooking pan.

As it was stated in the question, Copper has a higher density than the aluminum, therefore, copper would weight more than aluminum, making more difficult to manage. Aluminum then, has less mass than copper, and this is more effective and comfortable to use rather than a copper pan, that weight more and it could be very noisy to manage, than an aluminum pan with the same size.

If density of copper is 3.3 times greater, means that the mass of copper is also 3.3 times greater, therefore, if an aluminum pan weights about 400 g, a copper pan will weight more than 1.2 kg, and that's more difficult to manage and for the use.  

petroleum? coal maybe?

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.