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MissTica
3 years ago
13

Un método de laboratorio para preparar O 2 (g) consiste en la descomposición de KCIO 3 (s): KCIO 3 (s)  KCI(s) + O 2 (g) a) ¿Cu

ántos moles de O 2 se producen cuando se descomponen 32,8 g de KCIO 3 ? b) ¿Cuántos gramos de KCIO 3 deben descomponerse para obtener 50 g de 02? c) ¿Cuántos gramos de KCI se forman al descomponerse KCIO 3 formándose 28,3 g de O2? 3. ¿Cuántos gramos de Ag 2 CO 3 deben haberse descompuesto si se obtuvieron 7511 g de Ag según la reacción: Ag 2 CO 3  Ag(s) + CO 2 (g) + O 2 (g)?
Chemistry
1 answer:
FromTheMoon [43]3 years ago
4 0

Answer:

2a. 0.401 moles de O2

b. 127.7g KClO3

c. 43.95g KCl

3. 9600g Ag2CO3 debieron haberse descompuesto

Explanation:

Basados en la reaccion:

2KCIO 3 (s) → 2KCI(s) + 3O 2

2 moles de KClO3 producen 3 moles de oxígeno:

a. 32.8g de KClO3 son:

<em>Moles KClO3 -Masa molar: 122.55g/mol-</em>

32.8g * (1mol / 122.55g) = 0.2676 moles KClO3

<em>Moles O2:</em>

0.2676 moles KClO3 * (3moles O2 / 2mol KClO3) =

0.401 moles de O2

b. 50g O2 son:

<em>Moles O2 -Masa molar: 32g/mol-</em>

50g O2 * (1mol/32g) = 1.5625 moles O2

<em>Moles KClO3:</em>

1.5625 moles O2 * (2mol KClO3 / 3mol O2) = 1.042 moles KClO3

<em>Masa KClO3:</em>

1.042 moles KClO3 * (122.55g/mol) =

127.7g KClO3

c. Las moles de O2 son:

28.3g O2 * (1mol / 32g) = 0.88 moles O2

<em>Moles KCl:</em>

0.88 moles O2 * (2mol KCl / 3mol O2) = 0.5896 moles KCl

<em>Masa KCl -Masa molar: 74.55g/mol-</em>

0.5896 moles KCl * (74,55g/mol) = 43.95g KCl

3. Basados en la reacción:

2Ag 2 CO 3 → 4Ag(s) + 2CO 2 (g) + O 2 (g)?

2 moles de Ag2CO3 reaccionan produciendo 4 moles de Ag. Las moles de Ag son:

<em>Moles Ag -Masa molar: 107.8682g/mol-</em>

7511g Ag * (1mol/107.8682g) = 69.63 moles Ag

<em>Moles Ag2CO3:</em>

69.63 moles Ag * (2moles Ag2CO3/4molesAg) = 34.82 moles Ag2CO3

<em>Masa Ag2CO3-Masa molar: 275.7453g/mol-</em>

34.82 moles Ag2CO3 * (275.7453g/mol) =

9600g Ag2CO3 debieron haberse descompuesto

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