Cov txheej txheem:
Video: Leej twg tau muab lub tswv yim mole?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub npe mole yog 1897 txhais lus ntawm German unit Mol, coined los ntawm Chemist Wilhelm Ostwald Xyoo 1894 los ntawm German lo lus Molekül (molecule). Txawm li cas los xij, lub tswv yim sib npaug ntawm qhov sib npaug tau siv tsawg kawg ib puas xyoo dhau los.
Dhau li ntawm no, koj pom lub tswvyim mole li cas?
Mole tswvyim
- n = N / NA
- Molar mass ntawm ib yam khoom = (Ntau ntawm cov khoom hauv grams) / (Ntau ntawm Moles)
- Tus naj npawb ntawm Moles = (Mass of the Sample)/(Molar Mass)
- Number of Atoms los yog Molecules = (Number of Moles)*(6.022*10.23)
- 1 amu = (1g)/(6.022*1023) = 1.66*10-24 grams.
- Q.
- A.
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Tsis tas li ntawd, vim li cas peb thiaj siv lub tswvyim ntawm moles? Cov mole Nws yog ib qho tseem ceeb vim hais tias nws tso cai rau chemists ua hauj lwm nrog lub ntiaj teb subatomic nrog macro ntiaj teb units thiab cov nyiaj. Atoms, molecules thiab formula units yog me me thiab nyuaj heev rau kev ua haujlwm nrog feem ntau. Txhais cov mole nyob rau hauv txoj kev no tso cai rau koj hloov grams rau moles los yog moles rau particle.
Ib yam li ntawd, koj tuaj yeem nug, Mole tswvyim piv txwv yog dab tsi?
Cov Mole . Lub cim ntawm ib yam khoom yog txhais tsis tau tsuas yog los ntawm hom atoms lossis ions nws muaj, tab sis los ntawm qhov ntau ntawm txhua hom atom lossis ion. Rau piv txwv , dej, H2O, thiab hydrogen peroxide, H2O2, zoo ib yam li lawv cov molecules muaj li ntawm hydrogen thiab oxygen atoms.
Muaj pes tsawg moles nyob rau hauv ib grams?
Peb xav tias koj yog converting ntawm moles Hauv thiab grams . Koj tuaj yeem saib cov ntsiab lus ntxiv ntawm txhua chav ntsuas: molecular hnyav ntawm Hauv lossis grams SI base unit rau tus nqi ntawm cov khoom yog tus mole . 1 mole yog 1 moles Hauv, lossis 114.818 grams.
Pom zoo:
Lub mole tau muab tau li cas?
Avogadro tus naj npawb, tus naj npawb ntawm cov khoom nyob rau hauv mole, tuaj yeem txiav txim siab ua ntej ' suav' tus lej ntawm atoms hauv qhov chaw me me thiab tom qab ntawd scaling mus nrhiav tus naj npawb ntawm cov khoom uas yuav muaj qhov sib npaug ntawm atomic lossis molecular mass. hauv grams
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