
SM 11 Chimie
Authored by Château Château Eğitim
Chemistry
11th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La masse volumique d'une solution de H2XO4 à 49% est 1,2 g/cm^3. Determiner masse atomique de X lorsque la masse molaire de la solution est 6 mol/L.(H:1 O:16)
32
36
42
52
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si la température de la solution saturée préparée avec une quantité suffisante de sel X dans 250 g d'eau à 40 °C est abaissée à 20 °C, combien de g de sel X se déposeront au fond ?
10
15
20
25
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Combien de grammes de NaCI solide faut-il compter pour préparer une solution aqueuse de NaCl 0,2 molaire de 2 litres? (Na:23 Cl:35,5)
0,4
23,4
36
0,8
4.
OPEN ENDED QUESTION
3 mins • 1 pt
Pour le systeme ci-dessus, ou se rencontrent les deux gaz? C:12, He:4
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Dans un récipient fermé on a 24g. de He et 12g. de gaz H2. a 273K. Combien de mol de gaz doit-on enlever pour que la nouvelle pression devient 8atm.(H:1, He:4)
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
On ouvre le robinet sans changer la temperature. On sait que les gaz X et Y ne réagissent pas. Trouver le rapport de pressions partielles de deux gaz?
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7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many grams of NaNO3 are soluble in 100 g of water at 10 ºC?
10 g
40 g
80 g
100 g
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