Koj pom cov molar loj ntawm sodium li cas?
Koj pom cov molar loj ntawm sodium li cas?

Video: Koj pom cov molar loj ntawm sodium li cas?

Video: Koj pom cov molar loj ntawm sodium li cas?
Video: Txiv hluas niam laus ua dev daig caus. 21.09.2018 2024, Kaum ib hlis
Anonim

Piv txwv li, lub molar loj ntawm NaCl canbecalculated rau nrhiav lub atomic loj ntawm sodium (22.99g / mol) thiab atomic pawg ntawm chlorine (35.45 g / mol) thiab sib xyaw ua ke. Cov molar loj NaCl yog 58.44 g / mol.

Cov lus nug tseem yog, qhov molar loj ntawm sodium yog dab tsi?

22.989769 ua

Tsis tas li ntawd, qhov loj ntawm ib chav tsev ntawm NaCl yog dab tsi? Ib formula unit ntawm sodium chloride ( NaCl ) yuav hnyav 58.44 amu (22.98977 amu rau Na + 35.453amu rau Cl), soa mole ntawm sodium chloride yog 58,44g. Ib qho molecules ntawm dej (H2O) yuav hnyav 18.02amu (2 × 1.00797 amu rau H + 15.9994 amu rau O), thiab moleofwater molecules yuav hnyav 18.02 grams.

Xav txog qhov no, qhov molar loj ntawm sodium hydroxide yog dab tsi?

39,997 g / mol

Muaj pes tsawg moles nyob rau hauv ib grams?

Amazingly, muaj 6.02x10^23 atoms hauv txhua qhov piv txwv saum toj no. Ib qho piv txwv ntawm 12 grams ntawm carbon yog equaltoone mole . Tus nqi ntawm moles nyob rau hauv ib yam khoom tuaj yeem txiav txim siab siv cov khoom ntawd cov molar loj. Molar mass yog qhov ntau ntawm grams hauv ib mole ofasubstance.

Pom zoo: