Video: Yam dab tsi ntawm cov dej zoo tshaj plaws piav qhia nws lub peev xwm los yaj ntau yam khoom siv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Vim yog nws polarity thiab muaj peev xwm tsim hydrogen bonds, dej ua kom cov kuab tshuaj zoo heev, txhais tau tias nws ua tau yaj ntau yam sib txawv hom ntawm molecules.
Ib yam li ntawd, dab tsi ntawm cov dej ua rau nws muaj qhov hnyav?
polarity
Cov cuab yeej dej twg zoo tshaj plaws piav qhia nws lub peev xwm los yaj ntau cov tshuaj thiab dab tsi yog lub ntsiab lus ntawm lo lus no? Cov dej polar xwm txhais tau tias tias nws tuaj yeem ua raws li thiab yaj tag nrho lwm yam tshuaj.
Tom qab ntawd, dab tsi yog cov yam ntxwv ntawm cov kuab tshuaj zoo?
Cov yam ntxwv ntawm qhov zoo Recrystalization Solvent : Lub recrystallization kuab tshuaj Yuav tsum tsis txhob yaj cov tshuaj kom huv ntawm chav tsev kub, tab sis nws yuav tsum yaj nws zoo ntawm qhov cov kuab tshuaj boiling point 2. Lub kuab tshuaj yuav tsum dissolve soluble impurities zoo nyob rau hauv chav tsev kub. 3.
Dab tsi ntawm cov khoom hauv qab no ntawm dej piav qhia nws lub peev xwm ua kom yaj acetic acid?
Lub siab ntom ntom ntawm dej , uas yog vim yog tsim ntawm hydrogen bonds ntawm nyob ib sab dej molecules. Cov muaj peev xwm los ua ib qho tsis, absorbing protons muab los ntawm acetic acid.
Pom zoo:
Yuav ua li cas hydrogen bonding ntawm cov dej molecules pab piav qhia dej lub peev xwm nqus tau ntau lub zog ua ntej evaporation?
Cov hydrogen bonds hauv dej tso cai rau nws nqus thiab tso tawm lub zog cua sov qeeb dua li ntau lwm yam khoom. Qhov kub thiab txias yog ib qho kev ntsuas ntawm qhov kev txav (kinetic zog) ntawm cov molecules. Raws li cov lus tsa suab nce, lub zog yog siab dua thiab yog li kub siab dua
Cov nqe lus twg zoo tshaj plaws piav qhia txog qhov tseem ceeb ntawm cov lus qhia muaj nuj nqis?
Qhov tsis suav nrog tus nqi ntawm ib qho kev qhia rational yog qhov tseem ceeb uas tus denominator ntawm qhov kev qhia yog xoom. Tsis tas li ntawd, tus naj npawb ntawm zeros ntawm ib tug polynomial yeej ib txwm tsawg dua los yog sib npaug rau degree ntawm lub polynomial. Yog li ntawd, tus naj npawb ntawm cov txiaj ntsig tsis suav nrog cov lus qhia muaj txiaj ntsig tsis tuaj yeem tshaj li qib ntawm tus lej
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Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom
Dab tsi yog qhov kev piav qhia zoo tshaj plaws ntawm lub ntiaj teb nebula yog dab tsi?
Planetary nebula yog ib qho khoom siv hnub qub uas muaj lub plhaub ci ntsa iab ntawm cov pa roj thiab cov ntshav uas tsim los ntawm qee hom hnub qub thaum kawg ntawm lawv lub neej. Lawv nyob rau hauv qhov tseeb tsis cuam tshuam rau cov ntiaj chaw; lub npe originates los ntawm ib tug supposed zoo sib xws nyob rau hauv tsos rau giant ntiaj chaw