Final answer:
To find the grams of copper in 2.22 grams of copper(I) carbonate, calculate the molar mass and use stoichiometry to determine there are 1.51 grams of copper.
Step-by-step explanation:
To calculate how many grams of Cu are in 2.22 grams of copper(I) carbonate (Cu2CO3), you must find the molar mass of copper(I) carbonate and determine how much copper is in one mole of the compound. Then you can use stoichiometry to find the mass of copper that would be in 2.22 grams of copper(I) carbonate.
First, calculate the molar mass of Cu2CO3. Discovering that the molar mass is about 187.11 g/mol, with copper having an atomic mass of approximately 63.55 g/mol, you multiply this by 2 because there are two moles of Cu in one mole of copper(I) carbonate:
2 moles Cu x 63.55 g/mol = 127.1 g Cu
Now, divide the mass of your sample by the molar mass of copper(I) carbonate to find how many moles are in your sample:
2.22 g Cu2CO3 / 187.11 g/mol = 0.01187 mol Cu2CO3
Since there are two moles of Cu for every mole of Cu2CO3, multiply 0.01187 mol by 2 and then by the atomic mass of copper to find the mass of Cu in your sample:
0.01187 mol Cu2CO3 x 2 x 63.55 g/mol = 1.51 g Cu
Hence, there would be 1.51 grams of copper in 2.22 grams of copper(I) carbonate.