Caffeine muaj qhov hnyav molecular ntawm 194.
Nws muaj qhov hnyav ntawm 194 nws muaj 28.9% los ntawm qhov loj ntawm nitrogen tus lej ntawm cov atoms ntawm nitrogen hauv ib lub molecule ntawm nws?
yog li ntawd 194g ntawm caffeine muaj (28.9/100)194=56.06g ntawm Nitrogen. Faib qhov hnyav ntawm Nitrogen tam sim no nrog atomic hnyav ntawm Nitrogen, piv txwv li 14, 56.06/14, peb tau kwv yees li 4. Yog li 4atoms ntawm Nitrogen muaj nyob rau hauv 194g ntawm caffeine.
Dab tsi muaj qhov hnyav molecular ntawm 32?
Vim tias ob lub ntsiab lus no yog diatomic hauv huab cua - O2 thiab N2, molar pawg ntawm oxygen gas is aprox. 32 g / mol thiab molar loj ntawm nitrogen gas yog kwv yees li. 28 g / mol.
Kuv yuav xam molecular hnyav li cas?
Sample Molecular Weight Calculation
Siv lub sij hawm lub sij hawm ntawm cov ntsiab lus los nrhiav cov atomic luj, peb pom tias hydrogen muaj ib qho hnyav atomic ntawm 1, thiab oxygen's yog 16. Yuav kom xam cov molecular hnyav ntawm ib qho dej molecule, peb ntxiv cov kev koom tes los ntawm txhua lub atom; uas yog, 2(1) + 1(16)=18 grams/mole.
Cov mis rau moles rau grams yog dab tsi?
Cov molar loj ntawm atoms ntawm ib lub ntsiab yog muab los ntawm tus qauv txheeb ze atomic loj ntawm lub caij muab faib los ntawm molar loj tas li, 1 × 10−3 kg / mol=1 g / mol.
