Video: Yuav ua li cas yog lub sum ntawm cov atomic masses ntawm tag nrho cov atoms nyob rau hauv ib tug qauv rau ib tug compound?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov formula loj ntawm ib yam khoom yog qhov sum ntawm qhov nruab nrab atomic masses ntawm txhua tus atom sawv cev hauv tshuaj qauv thiab yog qhia nyob rau hauv atomic loj units. Cov formula loj ntawm covalent compound tseem hu ua molecular pawg.
Tsis tas li ntawd, lo lus twg sawv cev rau cov lej ntawm atomic masses?
Formula pawg - tus sum ntawm cov atomic masses ntawm tag nrho atoms nyob rau hauv lub formula unit ntawm ib tug ionic compound.
Ib tug kuj yuav nug, dab tsi yog qhov sib npaug ntawm cov atomic masses ntawm cov atoms nyob rau hauv ib lub molecule ntawm C3H6Br2 hu ua? Cov Cov lej ntawm cov atomic masses ntawm cov atoms hauv ib lub molecule ntawm C3H6Br2 . yog hu ua tus. (1) formula pawg . (2) isotopic pawg.
Tsis tas li ntawd, txhais tau tias yog cov lej ntawm cov atomic masses hauv cov molecule?
Molecular Mass Definition Molecular mass yog tus lej sib npaug tus sum ntawm cov atomic masses ntawm atoms hauv a molecule . Cov molecular loj muab cov pawg ntawm a molecule txheeb ze ntawm cov 12C atom , uas yog coj los muaj a pawg ntawm 12.
Muaj pes tsawg moles nyob rau hauv ib grams?
Cov lus teb yog 0.0087094358027487 Peb xav tias koj tab tom hloov ntawm moles Hauv thiab gram. Koj tuaj yeem saib cov ntsiab lus ntxiv ntawm txhua chav ntsuas: molecular hnyav ntawm Hauv lossis grams Lub hauv paus SI rau cov khoom siv yog mole. 1 mole yog sib npaug 1 moles Hauv, los yog 114.818 grams.
Pom zoo:
Puas yog tag nrho cov atoms ntawm magnesium muaj tib lub atomic loj?
A: Magnesium, nyob rau hauv nws daim ntawv elemental, muaj 12 protons thiab 12 electrons. Cov neutrons yog qhov txawv. Magesium qhov nruab nrab atomic mass yog 24.305 atomic mass units, tab sis tsis muaj magnesium atom muaj raws li qhov loj no
Yuav ua li cas tshwm sim rau atoms nyob rau hauv cov tshuaj tiv thaiv raws li Dalton lub atomic txoj kev xav?
Dalton's Atomic Theory Tag nrho cov atoms ntawm ib lub caij yog tib yam. Cov atoms ntawm cov ntsiab lus sib txawv sib txawv hauv qhov loj thiab loj. Cov tshuaj yog tsim los ntawm kev sib txawv ntawm cov lej sib txawv ntawm cov atoms. Cov tshuaj tiv thaiv tshuaj ua rau muaj kev hloov pauv ntawm cov atoms hauv cov reactant thiab cov khoom sib txuas
Lub ntiaj teb yuav hloov li cas yog tias cov nyhuv tsev cog khoom tsis muaj nyob rau hauv tag nrho cov lus nug?
A) Yog tsis muaj cov nyhuv tsev cog khoom, lub ntiaj teb yuav tawg tag nrho nws cov cua sov rau hauv qhov chaw. b) Txhua lub hnub ci hluav taws xob tuaj yeem nqus tau yam tsis muaj lub tsev cog khoom. C) Qhov tshwm sim ntawm tsis muaj cov nyhuv tsev cog khoom yuav yog lub ntiaj teb kub heev uas yeej tsis txias
Yuav ua li cas yog ib tug piv txwv ntawm ib tug rational naj npawb uas tsis yog ib tug tag nrho?
Tus lej "rational" yog qhov piv ntawm ob tus lej. Piv txwv li, cov hauv qab no yog cov lej rational, thiab tsis muaj leej twg yog tus lej: 1 / 2. 2 / 3
Ntau npaum li cas ntawm cov pej xeem hauv ntiaj teb nyob ntawm cov kab ke roob rau tag nrho lossis qee qhov ntawm lawv cov dej?
Roob yog lub ntiaj teb "dej yees," muab 60-80% ntawm tag nrho cov dej tshiab rau peb ntiaj chaw. Tsawg kawg ib nrab ntawm lub ntiaj teb cov pej xeem nyob ntawm roob ecosystem kev pabcuam kom muaj sia nyob - tsis yog dej xwb, tab sis kuj muaj zaub mov thiab lub zog huv