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jacquetjulie72
@jacquetjulie72
June 2021
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Bonjour j'ai vraiment besoin d'aide s'il vous plaît...
Exercice 2 : La mer Morte a une concentration de sel de 275g/L.
1. Quelle est la masse de sel contenue dans une bouteille de 75CL d'eau de la mer Morte?
2. Quel est le volume d'eau de la mer Morte nécessaire pour avoir 1kg de sel?
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Cadoch
Bonjour ,
1) 75 cL = 0,75L
Donc
Produit en croix
pour 1L ➪ 275 g
Pour 0,75 ➪ xg
(0,75x275 ) /1 = 206,25 g de sel pour 75 cL
2) 1kg = 1000g
Donc
Produits en croix
Pour 275g ➪ 1L
Pour 1000g ➪ xL
(1000x1)/275 = environ 3,63 L pour avoir 1KG de sel
voila j’espère avoir pu t’aider
bonne journée
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Lista de comentários
1) 75 cL = 0,75L
Donc
Produit en croix
pour 1L ➪ 275 g
Pour 0,75 ➪ xg
(0,75x275 ) /1 = 206,25 g de sel pour 75 cL
2) 1kg = 1000g
Donc
Produits en croix
Pour 275g ➪ 1L
Pour 1000g ➪ xL
(1000x1)/275 = environ 3,63 L pour avoir 1KG de sel
voila j’espère avoir pu t’aider
bonne journée