what is the percentage of sulfur and copper(I) sulfide, Cu2S is the answer 35.58% if not could you show me the formula
Cu2S has a molar mass of 159.158 but you need to confirm that by adding the atomic masses of the elements.
Cu = 63.546
S = 32.066, again confirm these.
% Cu = [2xCu/Cu2S]*100 = 79.85% but check my arithmetic.
% S = [32.066/159.158]*100 = 20.15%
To calculate the percentage of sulfur in copper(I) sulfide, Cu2S, we need to determine the molar masses of sulfur and copper(I) sulfide.
The molar mass of sulfur (S) is 32.06 g/mol.
The molar mass of copper(I) sulfide (Cu2S) is the sum of the molar masses of two copper atoms (2 * 63.55 g/mol) and one sulfur atom (32.06 g/mol), giving us a total of:
(2 * 63.55 g/mol) + 32.06 g/mol = 159.16 g/mol.
Next, we can calculate the percentage of sulfur in copper(I) sulfide:
(32.06 g/mol / 159.16 g/mol) * 100% = 20.14%.
Therefore, the actual percentage of sulfur in copper(I) sulfide is 20.14%, not 35.58% as previously mentioned.
To calculate the percentage of an element in a compound, you need to know the molecular weight of the element and the compound. In the case of copper(I) sulfide (Cu2S), we can calculate the percentage of sulfur by following these steps:
Step 1: Find the molecular weight of sulfur (S) and copper (Cu).
Sulfur (S) has an atomic weight of 32.06 g/mol.
Copper (Cu) has an atomic weight of 63.55 g/mol.
Step 2: Calculate the molecular weight of Cu2S.
Since Cu2S has two copper atoms and one sulfur atom, the molecular weight is:
(2 * atomic weight of Cu) + (1 * atomic weight of S)
= (2 * 63.55 g/mol) + (1 * 32.06 g/mol)
= 127.1 g/mol + 32.06 g/mol
= 159.16 g/mol
Step 3: Calculate the percentage of sulfur in Cu2S.
To find the percentage, use the following formula:
Percentage of Sulfur = (Atomic weight of S / Molecular weight of Cu2S) * 100
Plugging in the values:
Percentage of Sulfur = (32.06 g/mol / 159.16 g/mol) * 100
= 0.2016 * 100
= 20.16%
Therefore, the correct percentage of sulfur in Cu2S is 20.16%, not 35.58%.
Note: It is essential to refer to reliable sources or reference material for accurate atomic weights and molecular weights when performing calculations.