2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev piav qhia: Ethylamine yog tau los ntawm Acetamide los ntawm siv Sodium () thiab cawv lossis los ntawm kev siv Raney nickel catalyst.
Yuav ua li cas ethylamine npaj los ntawm acetonitrile?
Ethylamine tuaj yeem tau txais los ntawm acetonitrile los ntawm nws qhov txo qis. Ethylamine yog lub hauv paus muaj zog tshaj ammonia. Qhov no yog vim lub fact tias methyl pab pawg neeg yog electron pub dawb pab pawg, thiab nws nyhav kom cov electron ceev ib N-atom (+ kuv nyhuv).
Koj yuav npaj ethanamine los ntawm Ethanamide li cas?
Teb tiav:
Thiab thaum kawg ethanamide raug kho nrog B{r_2}/KOH los tsim cov tshuaj methanamine. los tsim methyl iodide, uas yog rov kho nrog cawv KCN los tsim methyl cyanide uas ntxiv tsim ethanamine.
Koj tuaj yeem npaj ethylamine los ntawm acid amide li cas?
Ans: Peb tuaj yeem npaj ethylamine hauv chav kuaj los ntawm Hofmann's bromide cov tshuaj tiv thaiv. Propionamide yog rhuab nrog bromine thiab potassium hydroxide tov.
Vim li cas ethylamine muaj zog dua acetamide?
Tau qhov laj thawj. cov nyhuv thiab nws tsub kom cov electron ceev ntawm nitrogen atom. Yog li ntawd, electron tso siab nyiam ntau duahauv ethylamine dua li hauv acetamide lossis yav dhau los yog lub hauv paus muaj zog dua.
Pom zoo:
Vim li cas qee cov kws tshawb fawb tau sib cav tias venus ntawm willendorf yuav tsum tau hloov lub npe 'poj niam' ntawm willendorf?
Txawm li cas los xij, cov kws tshawb fawb keeb kwm niaj hnub no tau ua thawj coj kev sib tw los hloov lub npe tus pej thuam 'Tus Poj Niam ntawm Willendorf', tsis yog 'Venus of Willendorf', vim qhov laj thawj tom qab lub npe menyuam yaus yog ib tus neeg nyiam sib deev.
Yuav ua li cas kom tshem tau ntawm nostoc ntawm gravel driveway?
Hloov cov xwm txheej uas lub ntiaj teb ntsuab loj hlob no yuav tshem tawm cov khoom siv. Aerate cov av uas zoo li yuav loj hlob, tshem tawm cov dej zoo ntawm cov av nyob ib ncig ntawm thaj chaw thiab tshem tawm qhov ntxoov ntxoo. Raws li kuv tau ua tiav kuv qhov kev tshawb fawb, kuv tau pom tias baking soda sprinkled hla lub nostoc algae yuav tua nws.
Kuv puas yuav tsum tau blister ntawm ko taw los ntawm kev khiav?
Yog koj muaj hlwv me me uas tsis thab koj cia nws tsis tseg . Cov tawv nqaij ua raws li kev tiv thaiv npog dhau ib puag ncig tsis muaj menyuam. Tsis tas li ntawd, yog tias cov kua dej me me thiab koj sim pop nws, koj tuaj yeem ua rau muaj teeb meem ntxiv los ntawm kev ua rau nws los ntshav.
Kuv puas yuav tsum tau zam se ntawm kuv cov nyiaj tau los?
Nyiaj tshwj xeeb Theem IRS txiav txim siab nyiaj ntxiv "cov nyiaj ua haujlwm ntxiv," uas txhais tau tias koj tuaj yeem tau them se cov nyiaj tau los ntawm nws, zoo li koj ua rau koj cov nyiaj hli ib txwm lossis cov nyiaj ua haujlwm ib teev.
Los ntawm txoj cai ntawm 1858 Is Nrias teb yuav tsum tau tswj hwm?
Tsoomfwv ntawm Is Nrias Txoj Cai 1858 yog Txoj Cai ntawm British Parliament uas dhau East India Company tsoomfwv thiab thaj chaw rau British Crown. Txoj cai ntawm lub tuam txhab hla tebchaws Askiv hauv Is Nrias teb tau xaus thiab nws raug xa mus rau tsoomfwv Askiv ncaj qha.
