Copper has been used for thousands of yers, either as a pure metal or in alloys. It is frequently used today in the production of wires and cables. Copper can be obtained through smelting or recylcing. Determine the energy associated with each of these processes in order to recycle 1.06 mol Cu. The smelting of copper occurs by the balanced chemical equation:CuO(s)+CO(g) --> Cu(s)+CO2(g)Where deltaHfCuO is = 155/kJ/mol. Assume the process of recycling copper is simplifed to just the melting of the solid Cu starting at 25 degrees C. The melting point of Cu is 1084.5 degrees C with deltaHfus =13.0 kJ/mol and a molar heat capacity, Cp, Cu =24.5 J/mol degrees C. Energy for recovering Cu from CuO from reaction about (answer in kJ)Energy for recycling Cu (answer in kJ)

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.