Answer: 2.0 moles of copper are required to replace silver from 4.0 moles of silver nitrate.
Step-by-step explanation:
The chemical equation for the reaction between copper and silver nitrate is:
Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag
From this equation, we can see that 1 mole of copper reacts with 2 moles of silver nitrate.
To find how many moles of copper are required to replace silver from 4.0 moles of silver nitrate, we need to use the mole ratio between copper and silver nitrate.
1 mole of copper reacts with 2 moles of silver nitrate, so:
1 mole Cu / 2 moles AgNO3
To calculate how many moles of copper are needed to replace 4.0 moles of silver nitrate, we can use the mole ratio as follows:
4.0 moles AgNO3 x (1 mole Cu / 2 moles AgNO3) = 2.0 moles Cu
Therefore, 2.0 moles of copper are required to replace silver from 4.0 moles of silver nitrate.