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gaiagrassi05
@gaiagrassi05
October 2020
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AIDEZ MOI SVP
1.Combien y a-t-il de molécules d’eau dans une bouteille de 1,5 L ?
2. Quelle est la quantité de matière correspondante ?
3. Combien cela fait-il de moles d’atomes d’hydrogène ? d’oxygène ?
Données
Masses :m(H)=1,67×10⁻²⁷kg ; m(O)=2,66×10⁻²⁶kg ;
Masse volumique de l'eau : 1,0 kg·L⁻¹ ; Nₐ=6,02×10²³mol⁻¹.
merci d'avance!
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