la quantité de matière
Quiz
•
Chemistry, Science
•
1st Grade
•
Practice Problem
•
Medium
laurent rimbourg
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13 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle est l'unité de la quantité de matière ?
le gramme
le kilogramme
la mole
le litre
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En chimie, "peser, c'est compter". Que signifie cette expression ?
la masse et la quantité de matière sont égales.
La quantité de matière est proportionnelle à la masse.
On mesure une quantité de matière avec une balance.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La masse molaire moléculaire de l'éthanol (formule brute : C2H6O) est égale à ...
M(H) = 1 g/mol
M(C) = 12 g/mol
M(O) = 16 g/mol
1 + 12 + 16 = 29 g/mol
12 + 2 x 1 + 6 x 16 = 110 g/mol
2 x 12 + 6 x 1 + 16 = 46 g
2 x 12 + 6 x 1 + 16 = 46 g/mol
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quelle est la bonne relation entre la quantité de matière et la masse de l'échantillon ?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La relation qui définit la masse volumique s'écrit .
Identifier la relation qui permet de calculer la masse.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Combien y a t il de molécules d'eau (H2O) dans une mole de molécules d'eau ?
1 molécule
3 molécules
6,02 x 102 molécules
6,02 x 1023 molécules
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Convertir 50 mL en Litre.
0,05 L
0,5 L
5 L
50 L
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