Question

Какое количество вещества кислорода расходуется при окислении меди, если образовался оксид меди массой 1,6 г?

Answer 1

2Cu + O2=2CuO
m(CuO)=1,6г
n(CuO)=1,6:80=0,8 моль
1:2
х:0,8
следовательно, n(О2)=0,8:2=0,4 моль

Answer 2

Calculating Oxygen Consumption in the Oxidation of Copper

When copper undergoes oxidation to form copper oxide, the amount of oxygen consumed can be calculated using stoichiometry. The balanced chemical equation for the oxidation of copper to form copper oxide is:

2Cu + O2 → 2CuO

Given that the mass of copper oxide formed is 1.6 g, we can calculate the amount of oxygen consumed using the stoichiometry of the reaction.

Using the molar mass of copper (Cu) and copper oxide (CuO) from the periodic table, we can calculate the amount of oxygen consumed.

The molar mass of Cu is approximately 63.55 g/mol, and the molar mass of CuO is approximately 79.55 g/mol.

Using the given mass of copper oxide (1.6 g), we can calculate the amount of oxygen consumed.

The steps involved in the calculation are as follows:

1. Convert the mass of copper oxide to moles. 2. Use the mole ratio from the balanced chemical equation to find the moles of oxygen consumed. 3. Convert the moles of oxygen to the amount of substance (in mol).

The calculation involves the use of stoichiometry and the molar masses of copper and copper oxide.

The amount of substance of oxygen consumed in the oxidation of copper can be calculated as follows:

Step 1: Convert the mass of copper oxide to moles. - Molar mass of CuO: 79.55 g/mol - Given mass of CuO: 1.6 g - Moles of CuO = Given mass / Molar mass - Moles of CuO = 1.6 g / 79.55 g/mol

Step 2: Use the mole ratio from the balanced chemical equation to find the moles of oxygen consumed. - From the balanced chemical equation: 2 moles of CuO require 1 mole of O2. - Moles of O2 = (Moles of CuO) / 2

Step 3: Convert the moles of oxygen to the amount of substance (in mol).

The amount of substance of oxygen consumed in the oxidation of copper can be calculated using the above steps and the molar masses of copper and copper oxide.

This calculation will provide the amount of substance of oxygen consumed in the oxidation of copper to form copper oxide.

Let's proceed with the calculation using the given information and the steps outlined above.