Sciences ST - Balancement et conservation de la masse
Quiz
•
Science
•
10th Grade
•
Practice Problem
•
Hard
Sebastien Guay
Used 63+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Quel est le nombre total de molécules et d'atomes dans l'expression
6 H2SO4
6 molécules et 7 atomes
6 molécules et 42 atomes
7 molécules et 6 atomes
42 molécules et 6 atomes
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Quelle est la valeur du coefficient manquant?
7
8
10
14
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Quel le nombre total d'atomes d'oxygène dans les produits?
7
12
15
30
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Quels sont, dans l'ordre, les trois coefficients servant à balancer cette équation?
2-3-1
4-3-2
2-2-1
4-4-2
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Quelle masse (g) de Fe2O3 produit-on par cette réaction chimique?
150
525
1 125
1 725
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Quelle séquence de coefficients respecte les règles de balancement d'équation?
2 - 59 - 2 - 20 - 48
1 - 39,5 - 1 - 10 - 24
1 - 15 - 1 - 6 - 12
2 - 20 - 2 - 10 - 4
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Combien de molécules d'eau sont produites par la combustiuon de 100 molécules de C8H18?
100
109
11
900
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