Video: Yuav ua li cas koj xam alum yield?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Los ntawm moles, koj tuaj yeem nrhiav grams los ntawm kev siv cov molar loj ntawm cov alum . Thaum kawg, rau % tawm los , nws yuav yog tiag tawm los (12.77g) muab faib los ntawm theoretical tawm los (x 100%).
Yog li ntawd, koj yuav ua li cas nrhiav tau qhov feem pua yield ntawm alum?
Rau xam qhov feem pua yield , koj faib qhov tseeb tawm los los ntawm theoretical tawm los thiab ces muab 100%. Txhawm rau txiav txim siab theoretical tawm los , ua ntej koj xav tau cov tshuaj sib npaug kev sib npaug rau cov tshuaj tiv thaiv thiab tom qab ntawd koj yuav tsum txiav txim siab qhov twg ntawm ob lub reactants yog qhov txwv reagent.
Tsis tas li ntawd, pes tsawg moles ntawm alum yog tsim los ntawm 1 mole? Yog li, qhov tseem ceeb stoichiometric uas cuam tshuam moles ntawm alum rau moles ntawm Al yog 2 moles alum /2 moles Al.
Tsis tas li ntawd, koj ua li cas suav cov qoob loo qoob loo?
Nws yog xam los ua qhov kev sim tawm los muab faib los ntawm theoretical tawm los multiplied los ntawm 100%. Yog qhov tseeb thiab theoretical tawm los yog tib yam, cov feem pua tawm los yog 100%. Feem ntau, feem pua tawm los qis dua 100% vim qhov tseeb tawm los feem ntau tsawg dua li qhov theoretical tus nqi.
Koj puas tuaj yeem suav cov txiaj ntsig feem pua ntawm cov moles?
Xam cov feem pua yield Ua ntau qhov xav tau moles ntawm cov khoom los ntawm nws cov molar mass. Piv txwv li, molar loj ntawm HF yog 20 grams. Yog li ntawd, yog koj xav 4 moles ntawm HF, theoretical tawm los yog 80g. Faib qhov tseeb tawm los ntawm cov khoom los ntawm theoretical tawm los thiab muab 100.
Pom zoo:
Yuav ua li cas koj xam tus qauv sib txawv ntawm PMP?
Cov mis siv nyob rau hauv PMBOK rau tus qauv sib txawv yog yooj yim. Nws tsuas yog (P-O) / 6. Qhov ntawd yog qhov pessimistic kev ua ub no kwv yees rho tawm qhov kev kwv yees qhov kev xav tau muab faib los ntawm rau. Qhov teeb meem yog qhov no nyob rau hauv tsis muaj txoj kev zoo los yog daim ntawv tsim ib qho kev ntsuas ntawm tus qauv deviation
Yuav ua li cas ib tug crystal ntawm alum txawv ntawm ib tug crystal ntawm poov tshuaj sulfate?
A) Teb yog: potassium aluminium sulfate yog siv lead ua nrog cubic qauv, potassium aluminium sulfate dodecahydrate (alum) yog hydrate (muaj dej los yog nws cov ntsiab lus)
Yuav ua li cas koj pom qhov theoretical yield ntawm methyl 3 Nitrobenzoate?
Qhov tseeb tawm los methyl - 3- nitrobenzoate crude khoom yog 2.6996 g thaum lub theoretical yield yog 3.9852 g. Qhov feem pua yield uas peb tau txais yog 67.74%. Lub melting point yog 75˚C - 78˚C thiab 76˚C - 78˚C, tus nqi raug kaw rau cov ntaub ntawv tus nqi uas yog 78˚C
Yuav ua li cas koj xam lub sij hawm nws yuav siv sij hawm mus ncig teb chaws?
Kwv yees seb koj yuav mus sai npaum li cas ntawm koj qhov kev mus ncig. Tom qab ntawd, faib koj qhov kev ncua deb ntawm koj qhov nrawm. Qhov no yuav muab rau koj anestimation ntawm koj lub sijhawm mus ncig. Piv txwv li, yog tias koj mus ncig yog 240 mais thiab koj yuav tsav 40 mais ib teev, koj lub sijhawm yuav yog 240/40 = 6hours
Yuav ua li cas koj xam lub sij hawm nws yuav siv ib yam khoom los poob?
Ntsuas qhov deb ntawm qhov khoom yuav poob hauv ko taw nrog tus pas ntsuas lossis ntsuas daim kab xev. Faib qhov kev ncua deb los ntawm 16. Piv txwv li, yog tias cov khoom yuav poob 128 ko taw, faib 128 los ntawm 16 kom tau 8. Xam cov square root ntawm cov kauj ruam 2 los nrhiav lub sij hawm nws yuav siv cov khoom poob hauv vib nas this