
SM10 Chimie
Authored by Château Château Eğitim
Chemistry
4th - 12th Grade
Used 2+ times

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8 questions
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1.
OPEN ENDED QUESTION
3 mins • Ungraded
On chauffe un solide et on obtient 12,1g d’un autre solide et 40L d’un gaz de masse volumique
0,2g/L. Quelle était la masse du solide chauffée initialement ?
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2.
OPEN ENDED QUESTION
3 mins • Ungraded
Equilibrez les équations suivantes avec des coefficients stoechiométriques :
A) Al(OH)3 + HCl ---> AlCl3 + H2O
B) C10H8 + O2 ---> CO2 + H2O
C) Fe + H2O ----> Fe3O4 + H2
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3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Quelle masse de potassium doit se combiner à 3,2g de soufre pour donner le sulfure de
potassium K2S ? K:39 S:32
15,6
7,8
6,4
3,2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Les éléments X et Y forment un composé dans le rapport des masses 3/2. Si on fait réagir 36g
de X et 20g de Y, quel élément va être en excès et quelle sera sa masse restante ?
4g Y
6g Y
6g X
12g X
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
14g de l’élément A forment avec 8 g de B le composé AB4. 7 g de A avec 6 de B forment
un deuxième composé. Quelle est sa formule ?
AB6
AB3
A2B3
A2B5
6.
OPEN ENDED QUESTION
3 mins • Ungraded
A et B forment deux composés:
1e-de formule AB2 contient 50% A.
2e de formule inconnue contient 75% B.Quelle est la formule de la 2e.
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7.
OPEN ENDED QUESTION
3 mins • Ungraded
Determiner le nombre de mole de SO2 qui contient 3,01x10^23 d'atomes au total.
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