Separation Methods Submitted By: Tiffany Lam Partner’s Name: Morgan Silveira Date of Submission: September 25‚ 2013 Lab Section: CHE110L*Z Purpose The purpose of this experiment is to use two common laboratory methods to see how mixtures can be separated based on physical properties. Paper chromatography will be used to separate the dye colors from M&M candy to see which colors contain yellow #5. Gravimetric separation will be used to separate salt and sand from
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1. Hydrogen Name: Hydrogen Atomic number: 1 Atomic Weight: 1.00794 grams/mole Standard state: gas at 198 K Hydrogen is the lightest Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up above 90% of Universe by weight. Hydrogen as water (H2O) is absolutely essential to life and it is present in all organic compounds. Hydrogen is lightest gas. Hydrogen gas was used in lighter-than-air balloons for transport but is far too dangerous because
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Data Collection and Processing Aspect One -2.00grams of Sr(NO3)2 used -2.00grams of CuSO4 -Reactants: Sr(NO3)2 and CuSO4 Trial Mass of Beaker (g) Mass of Beaker with Sr(NO3)2 (g) Mass of Beaker (g) Mass of Beaker and CuSO4 (g) Mass of Filter Paper (g) Mass of Filter Paper and Contents (g) 1 111.08±0.01 113.08±0.01 111.1±0.01 113.1±0.01 1.28±0.01 2.93±0.01 2 111.1±0.01 113.1±0.01 111.23±0.01 113.23±0.01 1.27±0.01 2.98±0.01 3 111.26±0.01 113.26±0.01 111.09±0.01 113.09±0.01 1.27±0.01
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Extraction (Ch # 07) Faraz Gohar Mr. Wayne Xie Chem 201 10/02/2012 Objectives : 1)To purify samples of organic compounds that are solids at room temperature. 2)To dissociate the impure sample in the minimum amount of an appropriate hot solvent Chemical Index : Naphthalene; mp 82 *C 1‚4-Dichlorobenzene; mp 56 *C 4-Chloroaniline; mp 68 - 71 *C; pKb 4.15 Ethyl 4-Aminobenzoate; mp 90 *C; pKb 4.92 Procedure :
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29) The structural formulas are given for these cis or trans alkenes. (a) trans-1‚2-dichloropropane (b) cis-2-pentene (c) cis-3-hexene (d) trans-2-hexene Write the structural formula for: (a) cis-1‚2-dichloropropene (b) trans-2-pentene (c) trans-3-hexene (d) cis-2-hexene 30) In each case‚ tell whether cis and trans exist. If they do‚ write the structural formulas for two isomers and label each cis or trans‚ (a) Br2CH2 : No (b) CH3CH2CH=CHCH2CH3: Yes (c) CH3CH=CHCH3:
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broaden their message‚ and wield unconventional weapons in unexpected ways‚” (Martin‚ 2013). With the internet and rapidly advancing sciences and technology terrorists have become even a larger threat than before. The first category of new high-tech methods is information technologies. This consists of computers‚ the internet‚ e-mail‚ and social networking sites. Cyberterrorism has become a central feature in many of the terrorist cells and groups. “Today‚ almost all active terrorist organizations
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Michigan Tech I woke up to my alarm beeping. I was anxious to get headed up to Michigan Tech for the week. I woke up my mom and then she drove me to Masyn’s house. Once we got there I loaded my stuff up into Masyn’s car and then we were on our way. Masyn and I arrived at Michigan Tech at around noon and then went to go get signed in. After I got my lanyard‚ I headed up to my room. I got there and realized that my name wasn’t hung up on my door. I went and told the counselor and he brought me
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Unlike other Hokies‚ I did not tour Virginia Tech before applying. In fact‚ I didn’t even know where Virginia Tech was before I started applying for colleges 2 years ago. I just knew this school was for me. It felt like a place where I could dream big. Getting a postcard from a senior Hokie before coming to Virginia Tech made it all the more incredible. Two years later‚ I will write these postcards for our new accepted Hokies myself. I also have done community service related activities every semester
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the public‚ just how far one man goes in order to stay ahead of his competition. The whole story starts when a young and smart computer programmer decides to start a high-tech start-up firm based on a great software idea. However‚ before the company starts‚ the young programmer‚ Milo‚ receives an amazing offer from a giant high-tech company. At this company‚ he would be part of a team of software engineers trying to create different forms of digital technology to work in harmony. The giant company
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instruments‚ cutting sutures‚ counting needles and other supplies that are essential to the surgery being performed at the time. Sometimes the surgical techs even operate suction machines‚ sterilizers‚ adjust lights to a specific area‚ and help operate diagnostic equipment that is in the surgical room. .Cynthia describes her position as “the primary surgical tech responsible for handling instruments‚ supplies‚ and equipment during all surgical procedures. These procedures range from minimally invasive biopsies
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