how many kg of chalcopyrite is needed to obtain 500g of pure copper
Here is a worked example. Just follow the steps.
Here is a worked example. Just follow the steps. http://www.jiskha.com/science/chemistry/stoichiometry.html
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 500. g of pure Cu?
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How many kilograms of Chalcopyrite to get 325g of Cu?
To determine the amount of chalcopyrite needed to obtain 500g of pure copper, we need to consider the composition of chalcopyrite and calculate the copper content within it.
Chalcopyrite is a mineral that contains both copper and iron sulfide. Its chemical formula is CuFeS2, meaning it consists of one copper (Cu) atom, one iron (Fe) atom, and two sulfur (S) atoms.
To calculate the amount of copper in chalcopyrite, we can use the atomic mass of copper (63.55 g/mol) and the molecular mass of chalcopyrite (183.5 g/mol).
Step 1: Determine the molar mass of copper (Cu):
The molar mass of copper is 63.55 grams per mole.
Step 2: Calculate the molar mass of chalcopyrite (CuFeS2):
The molar mass of chalcopyrite is calculated by adding the atomic masses of copper (Cu), iron (Fe), and two sulfur (S) atoms:
Molar mass of chalcopyrite = (Cu atomic mass) + (Fe atomic mass) + 2 * (S atomic mass)
= (1 * 63.55 g/mol) + (1 * atomic mass of Fe) + 2 * (1 * atomic mass of S)
Note: To calculate the atomic mass of Fe and S, you can refer to the periodic table.
Step 3: Calculate the percentage of copper in chalcopyrite:
Copper content (in grams) per mole of chalcopyrite = (Cu atomic mass / molar mass of chalcopyrite) * 100%
Step 4: Calculate the amount of chalcopyrite needed:
Mass of chalcopyrite (in grams) = (Mass of pure copper desired / copper content (in grams) per mole of chalcopyrite) * molar mass of chalcopyrite
By following these steps, you can calculate the amount of chalcopyrite needed to obtain 500g of pure copper from its composition.