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Neko [114]
3 years ago
15

Se ard 25g de magneziu de puritate 90%. Ce volum de oxigen se consumă și câti moli dioxid de magneziu se formează

Chemistry
1 answer:
alekssr [168]3 years ago
8 0

Answer:

10.5 dm3 O2

0.94 moles de MgO

Explanation:

La pregunta dice explícitamente que el magnesio es puro en un 90%.

Por lo tanto, masa de magnesio puro = 90/100 * 25G = 22,5 g

Número de moles de Mg = 22,5g / 24g/mol = 0,94 moles de Mg

La ecuación de reacción es;

2Mg (s) + O2 (g) ------> 2MgO (s)

Si 2 moles de Mg reaccionan con 1 moles de O2

0.94 moles de Mg reacciona con 0.94 * 1/2 = 0.47 moles de O2

Si 1 mol de O2 ocupa 22,4 dm3

0.47 moles de O2 ocupan 0.47 * 22.4 / 1 = 10.5 dm3

También;

2 moles de Mg producen 2 moles de MgO

Entonces, 0.94 moles de Mg producen 0.94 moles de MgO

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