Cov txheej txheem:
- Dab tsi yog polyhalogenated biphenyls?
- Dab tsi yog polyhalogenated hydrocarbons?
- Nws yog poly halogenated compound?
- Polyhalides piav qhia nrog piv txwv yog dab tsi?
Video: Polyhalogenation txhais li cas?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Polyhalogenated compounds (PHCs) yog txhua qhov sib txuas nrog ntau qhov hloov pauv ntawm halogens Lawv yog qhov tshwj xeeb thiab tseem ceeb vim tias lawv bioaccumulate hauv tib neeg, thiab suav nrog cov superset uas muaj ntau yam tshuaj lom. thiab cov tshuaj muaj carcinogenic ua tswv cuab.
Dab tsi yog polyhalogenated biphenyls?
Polychlorinated biphenyls (PCBs) thiab polybrominated biphenyls (PBBs) yog cov khoom uas nws lub cev / tshuaj lom neeg tau ua rau lawv siv kev lag luam thoob plaws… Nrog rau kev kwv yees ntawm kev pheej hmoo ntawm mob qog noj ntshav rau tib neeg.
Dab tsi yog polyhalogenated hydrocarbons?
Polyhalogenated aromatic hydrocarbons yog planar polycyclic organic compounds nrog ntau tus lej ntawm halogen atoms, feem ntau yog chlorine. … Cov tshuaj no yog tshuaj lom rau lub plab, nrog rau lub siab thiab lub txiav.
Nws yog poly halogenated compound?
Polyhalogen Compound - Dichloromethane, Trichloromethane, Tetrachloromethane, Iodoform, Freons, DDT. Cov hydrocarbons los yog cov pa roj carbon monoxide uas muaj ntau tshaj ib lub halogen atom (pab pawg 17 cov ntsiab lus ntawm cov lus niaj hnub niaj hnub) hu ua polyhalogen compounds.
Polyhalides piav qhia nrog piv txwv yog dab tsi?
tshuaj lom neeg ntawm cov hlau halides thiab halogens. Polyhalides uas muaj bromine (polybromides) thiab iodine (polyiodides) yog paub-piv txwv li, potassium triio-dide, KI 3; Cesium pentabromide, CsBr 5; thiab potassium enneaiodide, KI 9 Polybromides thiab polyiodides dissociate rau hauv ions hauv aqueous daws.
Pom zoo:
Txhais li cas los txhais ib yam dab tsi?
Lub ntsiab lus ntawm cov ntsiab lus yog ua tiav nyob rau hauv ib txoj kev uas yog raws li qhov chaw los yog lub ntsiab lus. Ib qho piv txwv ntawm cov ntsiab lus yog ib chav ua vaj qhia thaum ua haujlwm hauv vaj . Ib qho piv txwv ntawm lub ntsiab lus txhais li cas?
Puas qhov loj ntawm tus txiv neej txhais tes txhais li cas?
Ib tug txiv neej tes Size Hints at His Athletic Ability Cov txiv neej nrog ntiv nplhaib ntev dua txhais tes muaj zog dua, tsis hais lawv lub hnub nyoog thiab lub cev loj npaum li cas, ib pab pawg ntawm leej txiv-tus kws tshawb fawb pom. Ntau qhov kev tshawb fawb qhia txog qhov kev xav uas ntev ntiv tes txuas nrog kev ua kis las zoo tshaj thiab tag nrho lub zog .
Benumbed txhais li cas phau ntawv txhais lus?
xub. / (bɪˈnʌm) / verb (tr) ua kom loog lossis tsis muaj zog; deaden lub cev xav nyob rau hauv, raws li los ntawm txias. (feem ntau passive) ua kom tsis muaj zog; stupefy (lub siab, senses, yuav, thiab lwm yam) Lub ntsiab lus ntawm benumbed yog dab tsi?
Txhais tau tias dav dav txhais li cas?
adj. 1 muaj zoo heev los ntawm sab rau ib sab. 2 ntawm loj loj los yog scope; dav lossis dav. ib qho postpositive uas muaj qhov tshwj xeeb, esp. ntawm ib sab mus rau sab . txhais li cas? "Rau qhov" txhais tau tias tus neeg twg yog:
Koj txhais li cas los ntawm kev txhais lus?
transitive verb.: to question (qee tus, xws li ib tug nom tswv txawv teb chaws) raug cai hais txog kev ua nom ua tswv lossis txoj cai lossis kev coj tus kheej . piv txwv piv txwv yog dab tsi? Piv txwv li, thaum tus nom tswv hais rau pawg neeg li ' pej xeem', lossis tus kws qhia ntawv hais ib chav kawm li 'cov tub ntxhais kawm', cov neeg nyob rau hauv cov xwm txheej no raug nug kom txais yuav.
