Muaj pes tsawg moles nyob hauv cov tshuaj aspirin?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Koj tuaj yeem saib cov ntsiab lus ntxiv ntawm txhua chav ntsuas: molecular hnyav ntawm Aspirin lossis grams Cov mis molecular rau Aspirin yog C9H8O4. SI base unit rau tus nqi ntawm cov khoom yog mole. 1 mole yog sib npaug 1 moles Aspirin, los yog 180.15742 grams.

Thiab cov lus nug yog, pes tsawg moles nyob hauv cov tshuaj aspirin c9h8o4?

hom khoom. Piv txwv li, nyob rau hauv ib tug molecule ntawm tshuaj aspirin , c9h8o 4 , muaj 9 carbon atoms, 8 hydrogen atoms thiab 4 oxygen atoms. compound. Piv txwv li, ib mole ntawm aspirin muaj 9 moles carbon atoms, 8 moles ntawm hydrogen atoms thiab 4 moles ntawm oxygen atoms.

Ib sab saum toj no, pes tsawg moles ntawm cov tshuaj aspirin nyob hauv cov ntsiav tshuaj? Qhov no txhais tau hais tias ib qho mole ntawm cov tshuaj aspirin yuav muaj qhov loj ntawm 180.157 g. Tam sim no koj paub tias pes tsawg moles ntawm cov tshuaj aspirin koj muaj nyob rau hauv koj tus qauv, siv qhov tseeb tias ib mole ntawm ib yam khoom muaj 6.022 ⋅ 1023 molecules ua ntawm cov khoom ntawd - qhov no yog hu ua Avogadro tus lej.

Hais txog qhov no, koj ua li cas xam moles ntawm aspirin?

xam tus moles ntawm cov khoom los ntawm kev faib cov khoom loj hauv grams los ntawm qhov hnyav molecular hauv amu. Hauv qhov no, lub tshuaj aspirin ntsiav tshuaj muaj 250 mg, los yog 0.250 g. Yog li ntawd, 0.250 g ÷ 180.17 amu = 0.00139 moles ntawm aspirin.

Muaj pes tsawg moles ntawm aspirin nyob rau hauv ib ntsiav tshuaj hnyav 500 mg?

Molar loj ntawm tshuaj aspirin = 180. Yog li ntawd, moles ntawm aspirin = 500 × 1 0 − 3 / 180 = 2.78 × 1 0 − 3 = 278 × 1 0 − 5 = 500 imes10^{-3}/180 = 2.78 imes10^{-3} = 278 imes10^{-5} = 500 × 10−3/180=2. Luas = 78 x 10 - 3 = 278 x 10 - 5 mol.