nds 10 chi molarite

Quiz
•
Chemistry
•
10th Grade
•
Hard
Château Château Eğitim
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19 questions
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1.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Quelle masse de solution à 5% sera contiendra 3,2g de soluté ?
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
On veut préparer 200g d'une solution de soude à 15%. Quelles masses respectives d'eau et de soude faut-il mélanger ?
170-30
150-50
165-35
185-15
3.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Quelle masse d'acide sulfurique sera contenue dans 500g d'une solution à 25% ?
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
On dissout 50g de nitrate de potassium KNO3 dans 200g d'eau. Quel est le pourcentage de la solution ainsi obtenue ?
25%
50%
20%
5.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Calculer le volume d'une solution à 80% contenant 40g de soluté si la solution a une masse volumique de 1,6g/cm3 ?
6.
OPEN ENDED QUESTION
3 mins • 1 pt
Calculer la masse de chlorure de calcium CaCl2 contenue dans 50mL d'une solution à 35% dont la masse volumique est 1,25g/cm3 ?
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
Déterminer la masse volumique d'une solution à 10% d'alcool dans l'eau. La masse volumique de l'alcool pur est de 0,8g/cm3.
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