Please help with IV Chem 105-OnlinePrelab:1. Why does unpopped popcorn pop when heated?aid inof wat2. PleaseUnpopped popcorn.pops.pps when heated because the pressureinside the Kerne is builds.watch the video of the chemical analysis for the percent composition of a metal oxickingease watch the vid for com This eventually makes the crack,(save this data as you will use it for an upcoming prelab as well). Note that you will need to mincall work, units, and sig figs.1.4439Procedure:i.ii.iii.iv.Test tube 25.250g2.0026.69391.15gMass of Sample:Sample & tube:Mass of Copper:Copper + Test 26.400g26.400g-25.250g = 1.15g0.2939Mass of Oxygen:26.693-26.400g = 0.2939CherDetermine the percentage of Cu and Oxygen present in the SAMPLE% Cu:% O:ita1. Measure approximately 3-5mL of household cooking oil (either olive or vegetable oil) in abeaker(just has to be enough to cover the popcorn kernels).2. Grab a small square of tin foil and place on the top of the beaker. You will want toensure that this is on top so the kernel do NOT pop out. Record in the data table.3. Obtain 20 popcorn kernels and place inside the beaker and record the new mass withthe lid on.4. Once your masses from (1) and (2) are determined, start heating the beaker on top ofyour designated pan for Chemistry. Once kernels begin to pop, softly shake/agitate thebeaker to prevent burning. DO NOT BURN THE POPCORN.5. After the kernels finish popping, remove the beaker from the heating element andimmediately remove the lid so the contents can cool. Think why you would want the lidto be off in this situation when the system is cooling.a. If there are water droplets that have condensed on the walls of the beaker,gently wipe them off with a paper town but do not wipe any oil as it is massed. Ifthere are water droplets on the foil ploger

i. Test tube 25.250g Mass of Sample: Sample + tube: 26.6939 ii. Mass of Copper: iv. 1.15g 26.400g-25.250g = 1.15g 0.2939 Copper + Test 26.400g iii. Mass of Oxygen: 1.44 3g 26.693-26.400g = 0.2939 Determine the percentage of Cu and Oxygen present in the SAMPLE % Cu: _% O:

i. Test tube 25.250g Mass of Sample: Sample + tube: 26.6939 ii. Mass of Copper: iv. 1.15g 26.400g-25.250g = 1.15g 0.2939 Copper + Test 26.400g iii. Mass of Oxygen: 1.44 3g 26.693-26.400g = 0.2939 Determine the percentage of Cu and Oxygen present in the SAMPLE % Cu: _% O:

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.19QAP

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