Cov txheej txheem:
- CFCs ua li cas?
- chlorofluorocarbons siv dab tsi?
- Cov tshuaj formula ntawm chlorofluorocarbon yog dab tsi?
- Qhov twg yog lub hauv paus ntawm chlorofluorocarbons?
Video: Qhov twg ntawm cov kuab tshuaj hauv qab no yog siv rau hauv kev sib txuas ntawm chlorofluorocarbon?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Dichloromethane yog ntau yam kev lag luam hnyav. Tus kws tshawb fawb Belgian Frédéric Swarts pioneer lub synthesis ntawm CFCs nyob rau hauv 1890s.
CFCs ua li cas?
CFCs thiab HCFCs feem ntau yog tsim los ntawm kev sib pauv halogen pib los ntawm chlorinated methanes thiab ethanesCov derivatives brominated yog tsim los ntawm cov tshuaj dawb-radical ntawm chlorofluorocarbons, hloov C-H daim ntawv cog lus nrog C- Br daim ntawv cog lus. Feem ntau CFCs yog cov molecules me uas tsuas muaj ib lossis ob lub atoms xwb.
chlorofluorocarbons siv dab tsi?
Chlorofluorocarbons (CFCs) yog cov tshuaj tsis muaj tshuaj lom, tsis muaj hluav taws xob muaj cov tshuaj atoms ntawm carbon, chlorine, thiab fluorine. Lawv tau siv rau hauv tsim cov tshuaj aerosol, tshuab cov neeg ua npuas ncauj thiab cov khoom ntim, ua kuab tshuaj, thiab ua cov tub yees.
Cov tshuaj formula ntawm chlorofluorocarbon yog dab tsi?
Yog li cov tshuaj formula rau CFC-11 yog CFCl3. Ntawd yog, nws muaj 1 carbon atom, tsis muaj hydrogen, 1 fluorine atom, thiab 3 chlorine atoms.
Qhov twg yog lub hauv paus ntawm chlorofluorocarbons?
Qhov feem ntau ntawm CFCs yog tub yees, tab sis cov hluav taws tua hluav taws rau lub dav hlau thiab aerosols kuj emit CFCs rau hauv qhov chaw.
Pom zoo:
Koj puas ntxiv cov kuab tshuaj rau cov kuab tshuaj?
Mov kom huv si kom yaj lub solute Thaum cov kuab tau yaj lawm, ntxiv cov kuab tshuaj uas tseem tshuav los ua cov tshuaj uas xav tau ntim thiab sib tov kom huv si. Piv txwv li, ua 0.5 Litres ntawm 0.5 molar NaCl: … Ua ib qho kev daws teeb meem ntawm ib qho concentration ntawm cov tshuaj hauv Tshuag yog hu ua dilution .
Dab tsi ntawm cov hauv qab no yog cov ntsiab lus ntawm kev sib txuas lus qauv ntawm de-escalation?
Lub Yim Hli Mloog. Kev mloog tso cai rau tus neeg npau taws "dej," uas yog txhais tau tias ua kom lub zog npau taws. … Acknowledge. Relaying tias koj nkag siab tias tus neeg lub ntsiab lus yog dab tsi los yog kev xav pab los ntawm kev lees paub lawv cov kev xav.
Qhov twg ntawm cov kab ke hauv qab no yog siv los ua cov thauj tog rau nkoj tom qab kev nruj?
Kev piav qhia: Lub Freyssinet anchorage system yog siv dav hauv Tebchaws Europe thiab Is Nrias teb muaj lub tog raj kheej nrog lub conical sab hauv los ntawm qhov siab tensile xov hlau hla thiab tawm tsam cov phab ntsa uas xov hlau yog wedged los ntawm ib tug conical plug lined longitudinally nrog grooves rau tsev cov xov hlau .
Qhov twg ntawm cov tshuaj hauv qab no ntawm diazotization ua raws li kev sib txuas?
Teb: Cov tshuaj ntawm diazotization ua raws li kev sib txuas nrog yog p-Toluidine becoz nws yog thawj cov tshuaj tsw qab amines. thawj amines lossis thawj cov tshuaj tsw qab amines yog cov nucleophiles zoo uas yog vim li cas lawv tau txais kev sib txuas lus.
Nyob rau hauv ib qho kev tsis sib haum xeeb pn kev sib tshuam cov kev sib tshuam tam sim no ntawm qhov sib npaug yog?
Nyob rau hauv qhov tsis ncaj ncees PN-kho qhov kev sib tshuam tam sim no ntawm qhov sib npaug yog zero, vim tias sib npaug tab sis cov neeg nqa khoom hla hla kev sib tshuam . Thaum pn kev sib tshuam tsis ncaj ncees qhov kev sib tshuam tam sim no ntawm qhov sib npaug yog?
