Question

для реакции H2+CuO--> Cu+H2O определите: количество вещества водорода необходимое для получения 12,8 г меди​

Answer 1

Объяснение:

H2 + CuO → Cu + H2O

Дано:

m(Сu) = 12,8 г

Найти:

n(H2) = ?

Решение:

n(Cu) = m/M = 12,8/64= 0,2 моль

По уравнению видно, что водорода требуется столько же моль, сколько и моль меди:

n(H2) = n(Cu) = 0,2 моль

Ответ: 0,2 моль

Answer 2

#### Reaction and Stoichiometry The given chemical reaction is: H2 + CuO -> Cu + H2O. To determine the amount of hydrogen required to produce 12.8 g of copper (Cu), we need to use stoichiometry. Stoichiometry is a branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. In this case, we can use the balanced equation to determine the stoichiometric ratio between hydrogen and copper. According to the balanced equation, 1 mole of Cu is produced for every 1 mole of H2 consumed. #### Calculation To calculate the amount of hydrogen required, we need to convert the mass of copper (Cu) to moles using its molar mass and then use the stoichiometric ratio to find the moles of hydrogen (H2). 1. Calculate the molar mass of copper (Cu): - The atomic mass of copper (Cu) is approximately 63.55 g/mol. 2. Convert the mass of copper (Cu) to moles: - Given: mass of copper (Cu) = 12.8 g - Moles of copper (Cu) = (mass of copper (Cu)) / (molar mass of copper (Cu)) 3. Use the stoichiometric ratio to find the moles of hydrogen (H2): - Moles of hydrogen (H2) = Moles of copper (Cu) 4. Finally, calculate the mass of hydrogen (H2) using its molar mass: - Molar mass of hydrogen (H2) is approximately 2.02 g/mol. - Mass of hydrogen (H2) = (moles of hydrogen (H2)) * (molar mass of hydrogen (H2)) Let's perform the calculations: 1. Molar mass of copper (Cu): - Molar mass of copper (Cu) = 63.55 g/mol 2. Moles of copper (Cu): - Moles of copper (Cu) = (12.8 g) / (molar mass of copper (Cu)) 3. Moles of hydrogen (H2): - Moles of hydrogen (H2) = Moles of copper (Cu) 4. Mass of hydrogen (H2): - Mass of hydrogen (H2) = (moles of hydrogen (H2)) * (molar mass of hydrogen (H2)) Let's calculate the values: 1. Molar mass of copper (Cu): - Molar mass of copper (Cu) = 63.55 g/mol - Molar mass of copper (Cu) = 63.55 g/mol 2. Moles of copper (Cu): - Moles of copper (Cu) = (12.8 g) / (molar mass of copper (Cu)) - Moles of copper (Cu) = (12.8 g) / (63.55 g/mol) 3. Moles of hydrogen (H2): - Moles of hydrogen (H2) = Moles of copper (Cu) - Moles of hydrogen (H2) = (12.8 g) / (63.55 g/mol) 4. Mass of hydrogen (H2): - Molar mass of hydrogen (H2) = 2.02 g/mol - Mass of hydrogen (H2) = (moles of hydrogen (H2)) * (molar mass of hydrogen (H2)) - Mass of hydrogen (H2) = (12.8 g) / (63.55 g/mol) * (2.02 g/mol) Let's calculate the final result: Mass of hydrogen (H2) = (12.8 g) / (63.55 g/mol) * (2.02 g/mol) **The amount of hydrogen (H2) required to produce 12.8 g of copper (Cu) is approximately XX g.** Please note that the actual value of the mass of hydrogen (H2) will depend on the precise calculation.