Video: Qhov feem pua ntawm Na hauv NaF yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib feem pua ntawm cov khoom
| Element | Cim | Pawg Feem Xyuam |
|---|---|---|
| Sodium | Na | 54.753% |
| Fluorine | F | 45.247% |
Ib yam li ntawd, tej zaum koj yuav nug, qhov loj ntawm NaF yog dab tsi?
41,98817 g / mol
Tsis tas li ntawd, koj yuav ua li cas pom qhov loj feem pua ntawm ib qho kev sib xyaw hauv qhov sib tov? Feem pua Mass yog ib txoj kev qhia txog qhov concentration ntawm ib yam khoom hauv a sib tov los yog element nyob rau hauv a compound . Nws yog xam raws li tus pawg ntawm cov khoom faib los ntawm tag nrho pawg ntawm sib tov thiab tom qab ntawd muab faib ua 100 kom tau qhov feem pua.
Kuj kom paub yog, dab tsi yog cov qauv loj hauv atomic mass units rau NaF?
Kev sib xyaw ntawm NaF
| Element | Cim | Atomic Mass |
|---|---|---|
| Sodium | Na | 22,9898 g / mol |
| Fluorine | F | 18,9984 g / mol |
Dab tsi ntawm NaF yuav tsum tau ntxiv rau 50.0 mL?
Molar Mas NaF yog 41,99 g ib mol. Cia peb muab cov moles los ntawm molar pawg kom tau grams ntawm NaF . Yog li, 1.35 grams NaF yuav tsum tau ntxiv rau 50.0 mL ntawm 0.500 M HF tov kom ua tiav pH ntawm 3.25.
Pom zoo:
Qhov feem pua ntawm txhuas hauv alcl3 yog dab tsi?
Cov feem pua ntawm cov ntsiab lus Element Symbol Mass Percent Aluminium Al 20.235% Chlorine Cl 79.765%
Qhov feem ntawm 33 1 3 feem pua yog dab tsi?
Piv txwv tus nqi feem pua ntawm cov zauv feem 25% 0.25 1/4 331/3% 0.333 1/3 50% 0.5 1/2 75% 0.75 3/4
Dab tsi yog qhov feem pua ntawm magnesium los ntawm huab hwm coj hauv magnesium oxide?
Cov feem pua ntawm cov ntsiab lus Element Symbol Mass Percent Magnesium Mg 60.304% Oxygen O 39.696%
Qhov feem pua ntawm qhov loj ntawm BR hauv CuBr2 yog dab tsi?
Cov feem pua ntawm cov ntsiab lus Element Symbol Mass Percent Copper Cu 28.451% Bromine Br 71.549%
Dab tsi yog qhov feem pua enantiomeric tshaj ntawm qhov sib tov uas muaj 86?
Enantiomeric tshaj (ee): Qhov ntau tshaj ntawm ib qho enantiomer tshaj qhov sib tov ntawm enantiomers. Qhia lej: enantiomeric tshaj = % ntawm cov enantiomer loj - % ntawm cov me me enantiomer. Piv txwv li: Ib qho kev sib xyaw ua ke ntawm 86% R enantiomer thiab 14% S enantiomer muaj 86% - 14% = 72% ee