Question

Маса 45 кг 2кг олова 5 кг цинку а решта мидь .скилки всего

Answer 1

1)2+5=7   2)45-7=38кгвсего

Answer 2

......................

45-2-5=38кг меди

Answer 3

Calculation of Total Mass

To calculate the total mass, we need to add the masses of the different elements together.

Given: - Mass of lead (Pb) = 2 kg - Mass of zinc (Zn) = 5 kg - Rest of the mass is copper (Cu)

To find the total mass, we add the masses of lead, zinc, and copper:

Total mass = Mass of lead + Mass of zinc + Mass of copper

Substituting the given values:

Total mass = 2 kg + 5 kg + Mass of copper

To find the mass of copper, we subtract the sum of the masses of lead and zinc from the total mass:

Mass of copper = Total mass - (Mass of lead + Mass of zinc)

Substituting the given values:

Mass of copper = Total mass - (2 kg + 5 kg)

Now, let's calculate the total mass and the mass of copper.

Using the given values, the total mass is 45 kg.

Total mass = 45 kg

Substituting this value into the equation for the mass of copper:

Mass of copper = 45 kg - (2 kg + 5 kg)

Simplifying the equation:

Mass of copper = 45 kg - 7 kg

Mass of copper = 38 kg

Therefore, the total mass is 45 kg, and the mass of copper is 38 kg.

Answer

The total mass is 45 kg, and the mass of copper is 38 kg.