Determine the mass (in grams) of 1.45 mol of diphosphorus dioxide.
I am getting my answer to be 136.22g... but ITS NOT RIGHT aparantly.
All I did was that I took 1.45mol and multipled P2O2's molar mass...... to get grams right?
Right on the prodedure. However, how did you get five significant digits in the answer when your moles had only three significant digits?
calculate the mass in grams : 4.57 x 10^20 H2O2 molecules
To determine the mass of a substance, you need to multiply the number of moles by the molar mass of that substance. However, it seems you made an error in calculating the molar mass of diphosphorus dioxide.
To find the correct molar mass, you should consider the atomic masses of each element in the compound and multiply them by the number of atoms present. In this case, diphosphorus dioxide (P2O2) consists of two phosphorus atoms (P) and two oxygen atoms (O).
The atomic masses of phosphorus (P) and oxygen (O) are found on the periodic table, which are approximately 30.97 g/mol and 16.00 g/mol respectively. Therefore, the molar mass of diphosphorus dioxide (P2O2) can be calculated as follows:
(2 × molar mass of phosphorus) + (2 × molar mass of oxygen)
= (2 × 30.97 g/mol) + (2 × 16.00 g/mol)
= 61.94 g/mol + 32.00 g/mol
= 93.94 g/mol
Now that we have the correct molar mass, we can calculate the mass of 1.45 mol of diphosphorus dioxide by multiplying the number of moles by the molar mass:
Mass = number of moles × molar mass
= 1.45 mol × 93.94 g/mol
= 136.23 g
Therefore, the mass of 1.45 mol of diphosphorus dioxide is approximately 136.23 grams.