Question

Какая масса кальция образуется при прокаливании оксида кальция количеством вещества 5 моль

Answer 1

Ответ:

решение на фотогоафии:

Answer 2

Calculation of Calcium Mass from Calcium Oxide

To calculate the mass of calcium formed from the given quantity of calcium oxide, we can use the balanced chemical equation for the reaction of calcium oxide with heat:

CaO(s) + Δ → Ca(s) + O2(g)

From the balanced chemical equation, we can see that 1 mole of calcium oxide (CaO) produces 1 mole of calcium (Ca). Therefore, the molar mass of calcium oxide (CaO) is 56.08 g/mol, and the molar mass of calcium (Ca) is 40.08 g/mol.

Given that the quantity of substance (n) is 5 moles, we can calculate the mass of calcium formed using the following formula:

Mass = n * molar mass

Substituting the values: Mass = 5 moles * 40.08 g/mol = 200.4 grams

Therefore, the mass of calcium formed from 5 moles of calcium oxide is 200.4 grams.

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