2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Txoj kev xav tau tsis lees paub los ntawm Friedrich Wohler, uas tau pom tias heating silver cyanate cyanate Cyanate yog anion nrog cov qauv qauv [O=C=N]− , feem ntau sau OCN−. Nws kuj tseem hais txog cov ntsev uas muaj nws, xws li ammonium cyanate. Nws yog ib qho isomer ntawm qhov tsis tshua muaj zog fulminate anion [C−≡N+O]−. Cyanate ester yog ib qho organic compound uas muaj cov pab pawg cyanate. https://en.wikipedia.org › wiki › Cyanate
Cyanate - Wikipedia
(ib qho tshuaj inorganic) nrog ammonium chloride (lwm inorganic compound) tsim urea, tsis muaj kev pab los ntawm cov kab mob nyob los yog ib feem ntawm cov kab mob nyob.
Vim li cas tseem ceeb thiaj tsis kam lees?
Txoj kev xav tuaj yeem tsis lees paub vim tsis muaj cov ntaub ntawv sim uas txhawb nqa nws, thiab muaj cov ntaub ntawv sim uas qhia pom cov amino acids tuaj yeem tshwm sim los ntawm "cov kua zaub ua ntej" uas peb xav tau Lub ntiaj teb thaum ntxov kom muaj - nws hu ua Miller-Urey kev sim.
Txoj kev xav ntawm qhov tseem ceeb yog dab tsi thiab nws tau dag li cas?
Vitalism yog cov lus qhuab qhia uas txiav txim siab tias cov organic molecules tsuas yog tsim los ntawm cov kab ke nyob. Nws tau ntseeg tias cov tsiaj muaj sia muaj qee yam "lub zog tseem ceeb" uas xav tau los ua cov organic molecules. Yog li cov organic tebchaw tau xav tias muaj cov khoom tsis yog lub cev uas tsis muaj los ntawm cov khoom tsis muaj roj molecules.
Thaum twg txoj kev xav ntawm qhov tseem ceeb tsis lees paub?
In the thaum ntxov 19th caug xyoo, Jöns Jakob Berzelius, lub npe hu ua ib tug ntawm "txiv" ntawm niaj hnub chemistry, tsis lees paub mystical piav qhia txog qhov tseem ceeb, tab sis txawm li cas los xij tau sib cav tias kev tswj hwm lub zog. yuav tsum muaj nyob rau hauv cov teeb meem muaj sia los tswj nws txoj haujlwm.
Leej twg disproved vital force theory thiab ua li cas?
Vital Force Theory tau raug tsis lees paub hauv xyoo 1823 thaum Friedrich Wöhler ua ke thawj cov organic compound urea los ntawm ib qho inorganic compound, Ammonium cyanate.
Pom zoo:
Dab tsi yog qhov tseem ceeb thiab vim li cas nws tseem ceeb los txheeb xyuas koj qhov tseem ceeb?
Qhov tseem ceeb yuav coj koj hauv kev txiav txim siab hauv lub neej thiab ua rau koj taug qab. Qhov tseem ceeb tshaj plaws, qhov tseem ceeb tshaj plaws yuav ua rau koj ntseeg siab hais tias "tsis yog." Lawv pab koj txheeb xyuas qhov xav tau tiag tiag hauv koj lub neej, piv rau lwm tus xav tias tseem ceeb.
Puas yog qhov kev lees paub yog cov lus tsis lees paub?
O True. Kev lees paub yog cov lus tsis lees paub. Yog cov lus lees paub? Kev lees paub yog nqe lus uas lees lossis hais qhov tseeb ntseeg siab hauv koj qhov haujlwm. … Kev lees paub tsuas yog cov kab lus boolean uas tshawb xyuas seb cov xwm txheej rov qab muaj tseeb lossis tsis yog.
Puas tsis lees paub qhov lees paub?
Section 2-316 ntawm UCC tau teeb tsa cov cai raws li qhov kev lees paub ntawm kev ua lag luam yuav raug cais tawm ntawm daim ntawv cog lus rau kev muag khoom. … Raws li UCC, qhov kev tsis lees paub yog qhov tseeb yog tias nws tau sau, nthuav tawm, lossis nthuav tawm raws li tus neeg tsim nyog yuav tsum tau pom.
Vim li cas qhov tseem ceeb ntawm qhov muaj zog thiab qhov tsis muaj zog yog qhov tseem ceeb?
Nws yog ib qho tseem ceeb rau qhov tseem ceeb ntawm qhov ua tau zoo thiab qhov tsis muaj zog vim qhov no pab lub tuam txhab txiav txim siab txog thaj chaw uas lawv yuav tsum tau txhim kho ntxiv rau thaj chaw uas lawv ua tau zoo hauv. Vim li cas lub zog thiab qhov tsis muaj zog tseem ceeb?
Puas muaj vaj ntxwv lees paub puas tau raug tsis lees paub?
Royal Assent yog huab tais txoj kev pom zoo uas yuav tsum tau ua daim nqi rau hauv Txoj Cai ntawm Parliament. Thaum huab tais muaj cai tsis kam lees txais Royal Assent, nim no tsis tshwm sim; Lub sijhawm kawg li no yog xyoo 1707, thiab Royal Assent tau suav tias niaj hnub no raws li kev cai.
