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Video: Yuav ua li cas koj sau ib tug empirical formula nrog feem pua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov ntawv sau tseg
- Faib txhua % los ntawm atomic pawg ntawm lub ntsiab.
- Faib txhua cov lus teb los ntawm qhov tsawg tshaj plaws.
- Kho cov lej no rau hauv lawv qhov qis tshaj tus lej tag nrho.
Tom qab ntawd, koj yuav ua li cas thiaj nrhiav tau cov qauv empirical nrog feem pua?
qhov loj ntawm txhua lub ntsiab = tus feem pua muab. Hloov cov huab hwm coj ntawm txhua lub caij mus rau moles siv cov molar loj los ntawm lub sijhawm teem sijhawm. Faib txhua tus nqi mole los ntawm tus lej tsawg tshaj plaws ntawm moles suav. Hloov mus rau tus lej uas nyob ze tshaj plaws.
Tom qab ntawd, lo lus nug yog, koj yuav ua li cas thiaj nrhiav tau cov mis empirical los ntawm combustion? Xam cov empirical formula Qhov sib xyaw ntawm cov grams ntawm carbon, hydrogen, thiab oxygen. Xam cov qauv mass rau lub empirical formula thiab faib cov molecular mass los ntawm cov empirical formula mass tau n. Muab txhua tus subscripts nyob rau hauv lub empirical formula los ntawm n kom tau cov molecular qauv.
Ib yam li ntawd, tej zaum koj yuav nug, koj ua li cas txiav txim siab txog tus qauv ntawm tus qauv?
Kev suav ntawm ib qho Empirical Formula
- Kauj Ruam 1: Tau qhov loj ntawm txhua lub ntsiab lus hauv grams. Element % = mass in g = m.
- Kauj Ruam 2: Txiav txim seb tus naj npawb ntawm moles ntawm txhua hom atom tam sim no.
- Kauj Ruam 3: Faib tus naj npawb ntawm moles ntawm txhua lub caij los ntawm tus lej tsawg tshaj plaws ntawm moles.
- Kauj Ruam 4: Hloov cov lej rau tag nrho cov lej.
Dab tsi yog qhov empiric formula rau caffeine?
Qhov no yog qhov empirical formula . Teeb meem #4: Caffeine Cov ntsiab lus hauv qab no: carbon 49.48%, hydrogen 5.19%, oxygen 16.48% thiab nitrogen 28.85%.
Empirical thiab Molecular Cov qauv.
| carbon: | 8 |
|---|---|
| oxygen: | 2 |
| nitrogen: | 4 |
Pom zoo:
Yuav ua li cas koj thiaj nrhiav tau cov mis empirical nrog feem pua?
Transcript Faib txhua % los ntawm atomic mass ntawm lub caij. Faib txhua cov lus teb los ntawm qhov tsawg tshaj plaws. Kho cov lej no rau hauv lawv qhov qis tshaj tus lej tag nrho
Koj pom qhov kwv yees li cas feem pua ntawm kev siv txoj cai empirical?
Nrhiav thaj tsam hauv qab ntawm qhov nkhaus ntawm x = 9 txog x = 13. Txoj Cai Empirical lossis 68-95-99.7% Txoj Cai muab kwv yees feem pua ntawm cov ntaub ntawv poob hauv ib tus qauv sib txawv (68%), ob tus qauv sib txawv (95%) , thiab peb tus qauv sib txawv (99.7%) ntawm qhov nruab nrab
Yuav ua li cas tshwm sim thaum koj sib tov ib tug muaj zog acid nrog ib tug tsis muaj zog puag?
Hom 2: thaum muaj zog acid / base reacts nrog lub hauv paus tsis muaj zog / acid yog hydronium thiab hydroxyl ions tam sim no nyob rau hauv sib npaug amt ces ntsev thiab dej yog tsim thiab lub zog tso tawm uas tsawg tshaj li 57 kj / mole vim lub dissociation ntawm lub tsis muaj zog acid / puag uas feem ntau endothermic
Yuav ua li cas koj nrhiav tau ib tug magnetic teb nrog ib tug compass?
Magnetic fields tso lub plotting compass ze ntawm cov hlau nplaum ntawm ib daim ntawv. kos cov kev taw qhia ntawm lub tshuab raj lub ntsiab lus. txav lub plotting compass mus rau ntau txoj haujlwm sib nqus hauv qhov chaw sib nqus, kos lub koob taw qhia txhua zaus. koom nrog cov ntsiab lus los qhia cov kab teb
Yuav ua li cas koj sau ib feem raws li ib tug khoom ntawm ib tug tag nrho cov zauv thiab ib feem feem?
Cov cai los nrhiav cov khoom ntawm ib feem feem thiab tag nrho tus lej Peb xub sau tag nrho cov lej ua ib feem, piv txwv li, sau nws faib los ntawm ib qho; Piv txwv li: 7 yog sau ua 71. Peb mam li muab cov zauv. Peb muab cov denominators. Yog tias yuav tsum tau ua kom yooj yim, nws ua tiav thiab tom qab ntawd peb sau cov feem kawg