
C2 - CLASE 7 - ACTIVIDAD
Authored by Pamela Salinas
Chemistry
11th Grade
Used 5+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Se pesan 6,12 g de sodio (Na).
Determina ¿Cuántas moles representa? (PM=23g/mol)
0,27 moles
140,76 moles
2,70 moles
4,9 moles
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Se tiene 3,12 x 1023 átomos de cobre
(Cu). Determina. ¿Cuántos gramos representa? (PM=63,546g/mol)
2,34 g
0,52 g
32,92 g
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Determina la masa molar de las siguientes
sustancias Gas butano, C4H10
C= 12 g/mol
H= 1 g/mol
48
58
28
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
En un frasco de laboratorio hay 200 g de
tricloruro de hierro, FeCl3. Averigua cuántos
moles de esta sustancia contiene el
frasco. (PM =162,2 g/mol)
1,23 mol
0,81 mol
0,5 mol
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Si la fórmula del ácido clorhídrico es HCl,
¿cuál es la composición porcentual en
masa del hidrógeno y del cloro en este
compuesto?
H = 1 g/mol
Cl = 35 g/mol
2,8% H y 97,2% Cl
4,5 % H y 95,5% Cl
2,8% Cl y 97,2% H
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Ajusta la siguiente reacción química:
CaO(S) + C (S) → CO (g) + CaC2 (g)
CaO(S) + 2C (S) → 2CO (g) + CaC2 (g)
CaO(S) + C (S) → CO (g) + CaC2 (g)
CaO(S) + 3C (S) → CO (g) + CaC2 (g)
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Al tratar una muestra de dióxido de manganeso
con 20 g de cloruro de hidrógeno (PM=36g/mol),
se obtiene cloruro de manganeso (II) (PM= 125,844 g/mol), gas cloro y agua. Calcula la masa de MnCl2 que se obtendrá.
Mn2O3 + 6HCl → 2MnCl2 + Cl2 + 3H2O
142 g
0,19 g
23,3 g
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