Question

Определите массу меди (г), вступившей в реакцию с кислородом, если образовалось 0,05 моль оксида меди (2). Ответ дайте с точностью до десятых.

Answer 1

Calculation of the Mass of Copper Reacted with Oxygen

To determine the mass of copper (Cu) that reacted with oxygen (O) to form copper oxide (CuO), we need to use the balanced chemical equation for the reaction:

2Cu + O2 -> 2CuO

From the equation, we can see that 2 moles of copper react with 1 mole of oxygen to produce 2 moles of copper oxide.

Given that 0.05 moles of copper oxide (CuO) were formed, we can use the stoichiometry of the reaction to calculate the moles of copper (Cu) that reacted.

Using the mole ratio from the balanced equation, we have:

2 moles of CuO = 2 moles of Cu

Therefore, the moles of copper (Cu) that reacted is also 0.05 moles.

To calculate the mass of copper (Cu), we need to use the molar mass of copper, which is approximately 63.55 g/mol.

Mass of copper (Cu) = Moles of copper (Cu) * Molar mass of copper (Cu)

Mass of copper (Cu) = 0.05 moles * 63.55 g/mol

Mass of copper (Cu) = 3.18 g

Therefore, the mass of copper (Cu) that reacted with oxygen is approximately 3.18 grams.