
Cantidades químicas
Authored by Magdalena Loyola
Chemistry
12th Grade
Used 60+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Un mol de molécula de agua contiene
6,02 x 1023 átomos de hidrogeno
6,02 x 1023 moléculas de agua
6,02 x 1023 átomos de agua
una molécula de agua
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Si tenemos en cuenta que las masas moleculares del K= 39g/mol, Mn= 55g/mol y el O= 16g/mol, ¿cuál es la masa molecular del permanganato de potasio (KMnO4)?
15,8g/mol
158g
158g/mol
158 mol
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
¿ Considerando que la masa atómica del O es 16 g/mol, cuál es la masa molar del oxigeno molecular O2 ?
20 g/mol
30 g/mol
12 g/mol
32 g/mol
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En una molécula del compuesto anterior hay:
2 moles de hidrogeno
1mol de azufre
4 átomos de oxígeno
átomos de S
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Si la masa atómica de P es 31 g/mol, ¿cuántos g hay en 2 moles de P?
15,5
31
62
2 mol
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
que la masa molar del Calcio sea 40 g/mol significa que:
40 g es la masa de átomos de calcio
40 g es la masa de 40 g de calcio
40 g es la masa de 1 átomo de calcio
corresponde a la masa de 40 moles de calcio
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sabiendo que la masa molar del agua es 18 g/mol ¿cuántos moles hay en 180 g de agua?
10 mol
1 mol
0.1 mol
0.01 mol
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