Ethanol is produced by the following reaction at atmospheric pressure: c2h5 oh () c2h4 (g)h20 (g) c as an the reactants enter the reactor at 250 equimolar mixture (1 mol of each reactant), and liquid ethanol leaves the reactor at 332.8 k. how much heat needs to be removed from the reactor per mol of ethanol formed, if the reaction goes to completion? give your answer as a positive value, in kj to 1 decimal place data given: enthalpy change for reactants from 523.15 k to 298.15 k =-20051 heats for formation for c2h4 (g), h20 (g) and c2h50h are 52510, -241,818 and -277,690 j/mol respectively (1) take r 8.314 j/mol-k. = for ethanol, a, b and c are 3.518, 0.02001 and -6.002 x 10 6 respectively in the following function: cp -a + bt +ct2 r

Iknow #2 is d. i just need to know why

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.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?