
NDS 10 Chimie
Authored by Château Château Eğitim
Chemistry
1st - 12th Grade
Used 1+ times

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7 questions
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1.
OPEN ENDED QUESTION
3 mins • Ungraded
Calculez la masse d'un atome de Fe(56)en supposant que tous les atomes de fer sont identiques. Calculez la masse de 5 mol d'atomes fer.
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2.
OPEN ENDED QUESTION
3 mins • Ungraded
22g. de X2On contient 8g. d'oxygene et 1 mol de X. Trouver n et calculez la masse molaire de X. (O:16)
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3.
OPEN ENDED QUESTION
3 mins • Ungraded
Quelle masse de mercure Hg obtiendra-t-on par la décomposition de
12,04x10^23 molécules d’oxyde de mercure HgO? (Hg:200)
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4.
OPEN ENDED QUESTION
3 mins • Ungraded
CaC2 reagir avec l'eau pour donner Ca(OH)2 et C2H2. On fait reagir 100g de CaC2 avec 100g de H20. Ecrire et équilibrer la réaction. Trouver le réactif limitant, le volume de C2H2 obtenu. (Ca: 40, O:16, H:1)
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5.
OPEN ENDED QUESTION
3 mins • Ungraded
On réalise la combustion de 24,08x 10^23 molécules de C7H16 avec 89,6 L d'oxygene dans CNTP. Trovuer les masses des prodiuts, en citant la masse de réactif en exces. (C:12, O:16, H:1)
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6.
OPEN ENDED QUESTION
3 mins • Ungraded
En faisant réagir des masses identiques de chlore Cl2 et de sodium Na, on
obtient 0,4 mol de NaCl. Quelle est la masse de réactif en excès ? (Na:23
Cl:35)
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7.
OPEN ENDED QUESTION
3 mins • Ungraded
On fait réagir les masses égales de X2 et O2. On obtient 0,5 moles de X2O5 et il reste en exces 9g. de X2. Ecrire l'équaiton chimique et trouver la masse atomique de X.
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