Iodine(V) oxide (also known as iodine pentoxide) has the chemical formula I2O5. To determine the amount of iodine pentoxide that has a mass of 0.25 g, we need to use the molar mass of I2O5, which is approximately 317.8 g/mol.
The amount of iodine pentoxide (in moles) can be calculated using the formula:
moles = mass / molar mass
Plugging in the values, we get:
moles = 0.25 g / 317.8 g/mol = 0.0007868 mol
Therefore, the amount of iodine pentoxide that has a mass of 0.25 g is approximately 0.0007868 moles.