Question

Даю 50 баллов! СРОЧНО Какая масса алюминия содержится в алюминий оксиде АІ2О3 массой 5,10 кг? Ответ дайте с точностью до сотых, в килограммах.Яка маса Алюмінію міститься в алюміній оксиді АІ2О3 масою 5,10 кг? ВІдповідь дайте з точністю до сотих , в кілограмах.

Answer 1

Ответ на фото.......

Answer 2

Моля, забележете, че отговорът ще бъде на английски език поради технически ограничения.

The molar mass of Al2O3 is 101.96 g/mol, which means that one mole of Al2O3 has a mass of 101.96 grams. To find the mass of aluminum in 5.10 kg of Al2O3, we need to convert the mass of Al2O3 to moles and then use the mole ratio between aluminum and Al2O3 to find the mass of aluminum.

First, let's convert the mass of Al2O3 to moles:

5.10 kg Al2O3 x (1000 g / 1 kg) / 101.96 g/mol = 49.88 moles Al2O3

Next, we use the mole ratio between aluminum and Al2O3 to find the number of moles of aluminum:

1 mole Al / 2 moles Al2O3

49.88 moles Al2O3 x (1 mole Al / 2 moles Al2O3) = 24.94 moles Al

Finally, we convert the moles of aluminum to mass:

24.94 moles Al x 26.98 g/mol = 673.39 g Al

Therefore, the mass of aluminum in 5.10 kg of Al2O3 is 673.39 grams or 0.67 kg (rounded to two decimal places).