Bonjour,
j'ai un exercice mais je ne comprends pas, pourriez-vous m'aider stp.
la réacti...
Bonjour,
j'ai un exercice mais je ne comprends pas, pourriez-vous m'aider stp.
la réaction entre la craie et l'acide chlorhydrique produit un gaz. Avant réaction, on réalise la pesée schématisée ci-contre.
a:312g b:306g c:302g
sachant que l'acide chlorhydrique et le calcaire pèse 306g
Parmi les trois schémas, quel est celui qui représente correctement ce que l'on observe après avoir introduit le calcaire dans l'acide?
Answers: 1
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