Expected number of moles of copper oxide (using the emprical formula of copper oxide and the starting moles of Cu)
To find the expected number of moles of copper oxide, you'll need the empirical formula of copper oxide and the starting moles of copper (Cu). Here's how you can calculate it:
1. Determine the empirical formula of copper oxide: The empirical formula gives the simplest whole number ratio of atoms in a compound. Copper oxide is composed of copper (Cu) and oxygen (O). The empirical formula of copper oxide is CuO, indicating that there is one copper atom and one oxygen atom per molecule of copper oxide.
2. Find the molar mass of CuO: Look up the atomic masses of copper (Cu) and oxygen (O) on the periodic table. The molar mass of copper is 63.55 g/mol, and oxygen is 16.00 g/mol. To calculate the molar mass of CuO, add the atomic masses together:
Molar mass of CuO = (1 × molar mass of Cu) + (1 × molar mass of O)
= (1 × 63.55 g/mol) + (1 × 16.00 g/mol)
= 79.55 g/mol
3. Determine the starting moles of Cu: You'll need to know the amount (in moles) of copper (Cu) that you have. Let's call this value "n".
4. Calculate the expected number of moles of CuO: Multiply the starting moles of Cu by the ratio of moles of CuO to moles of Cu. According to the empirical formula, the ratio of moles of CuO to moles of Cu is 1:1.
Number of moles of CuO = n × (1/1)
= n
Therefore, the expected number of moles of copper oxide is equal to the starting number of moles of copper (Cu).