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axel vient d'acheter un barbecue fonctionnant au gaz de butane tout neuf ainsi qu'une bouteille de gaz de 6kg. Son barbecue consomme 500g de butane par heure. On rappelle que la combustion du butane nécessite du dioxygène et que l'air atmosphérique contient 20% de dioxygene seulement . Son barbecue consomme 2m3 de dioxygene par heure. il réalise la cuisson de sa viande dans son garage, ferme hermétiquement et d'un volume de 40m3. quelle sera la durée d'utilisation maximale de son barbecue
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axel vient d'acheter un barbecue fonctionnant au gaz de butane tout neuf ainsi qu'une bouteille de g...
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