Cov khoom xyaw ntawm ib qho sib txawv ntawm qhov muaj pes tsawg leeg sib tov . A compound is a pure substance pure substance A chemical substance is ib daim ntawv ntawm cov teeb meem uas muaj cov tshuaj tsis tu ncua thiab cov yam ntxwv zoo. Qee cov ntaub ntawv hais ntxiv tias cov tshuaj lom neeg tsis tuaj yeem muab cais rau hauv nws cov ntsiab lus los ntawm kev sib cais ntawm lub cev, piv txwv li, tsis muaj kev cuam tshuam tshuaj lom neeg. https://en.wikipedia.org › wiki › Chemical_substance
tshuaj lom neeg - Wikipedia
thiab nws tsuas muaj ib hom molecule thoob plaws. Txhua qhov sib xyaw ua ke muaj qhov sib xws, yog li txhua feem muaj cov khoom sib xws thiab cov yam ntxwv.
Yuav ua li cas lub melting ntau ntawm ib tug ntshiab compound txawv ntawm qhov sib tov?
Ib yam khoom ntshiab muaj lub ntsiab lus melting (melts ntawm ib qhov kub thiab txias) thiab qhov tob tob tob (boils ntawm ib qhov kub). Ib qho kev sib tov melts hla ntau qhov kub thiab txias tshaj qhov kub. Homogeneous sib tov yog hu ua kev daws teeb meem. … Heterogeneous tshuaj yeej ib txwm sib tov.
Qhov txawv ntawm qhov sib xyaw thiab cov lus nug sib xyaw yog dab tsi?
Ib qho sib xyaw yog ua los ntawm ob lossis ntau yam tshuaj uas tsis yog tshuaj sib xyaw ua ke whereas ib qho tshuaj yog ua los ntawm 2 lossis ntau lub ntsiab lus uas muaj tshuaj sib xyaw ua ke. … Cov ntsiab lus uas ua rau cov khoom sib xyaw ua kenyob rau hauv taag ratios. Piv txwv li, dej ib txwm yog ob lub atom ntawm hydrogen thiab ib atom ntawm oxygen.
Yuav ua li cas thaum sib txawv ntawm cov khoom siv coj los sib txawv?
Xav tias qhov sib txawv ntawm cov khoom siv coj mus kuaj muaj qhov sib txawv. Koj tuaj yeem xaus li cas txog cov khoom siv? Cov khoom yuav tsum yog sib tov. … Cov khoom yog ib yam khoom ntshiab (elemental los yog compound) los yog cov khoom yog ib tug tov (ib homogeneous sib tov).
Lub sij hawm rau kev kawm txog qhov muaj pes tsawg leeg thiab cov khoom ntawm cov teeb meem yog dab tsi?
Chemistry yog ceg ntawm kev tshawb fawb uas cuam tshuam nrog cov khoom, muaj pes tsawg leeg, thiab cov qauv ntawm cov ntsiab lus thiab cov tebchaw, lawv hloov pauv li cas, thiab lub zog uas tso tawm lossis nqus thaum lawv hloov.
