
NDS10 Chimie
Authored by Château Château Eğitim
Chemistry
KG - University
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8 questions
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1.
OPEN ENDED QUESTION
3 mins • Ungraded
Combien de grammes de soude NaOH réagira avec 98g d’acide
sulfurique H2SO4? H=1, Na=23, S=32, O=16
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2.
OPEN ENDED QUESTION
3 mins • Ungraded
On réalise la réaction entre N2 et O2 pour former N2O5. Si on prend 24g. de chaque réactif, quel élément reste en exces et quelle sera sa masse? N=14, O=16
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3.
OPEN ENDED QUESTION
3 mins • Ungraded
Apres la combustion de Fe, si le rendement de reaction est %40, combien de gramme de Fe2O3 peut on obtenir a partir de 56g. de Fe? (O:16, Fe:56)
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4.
OPEN ENDED QUESTION
3 mins • Ungraded
5g. Mg se réagit avec le HCl et on obtient 4,48 L. de H2 dans le CNTP. Quel est le rendement en pourcentage de cette reaction. Mg=24
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5.
OPEN ENDED QUESTION
3 mins • Ungraded
La graphique represente le changement de la masse des réactifs X et Y. D'apres la réaction quelle est la formule brute de composé obtenu. X=40, Y=32
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6.
OPEN ENDED QUESTION
3 mins • Ungraded
L'huile et le sucre sont des composés organiques. Contrairement au sucre, l'huile ne se dissout pas dans l'eau. Expliquer cette différence a l'aide des interactions moléculaires.
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7.
OPEN ENDED QUESTION
3 mins • Ungraded
D'apres la réaction donnée, 16g. de XOH réagit avec assez de quantité de H2SO4, on obtient 7,2g. de H20. Trouver la masse molaire de X? O=16, H=1
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