calculate the number of grams atom and gram molecules in 25.4milligrams of iodine ?
gram molecules = 0.0254/gram molecular weight of I2.
gram atoms is twice that.
To calculate the number of grams atom and gram molecules in 25.4 milligrams of iodine, we need to use the molar mass of iodine and Avogadro's number.
1. Convert milligrams to grams:
25.4 milligrams = 25.4 × 10^(-3) grams = 0.0254 grams
2. Find the molar mass of iodine:
The molar mass of iodine (I) is approximately 126.90 grams/mole.
3. Calculate the number of gram atoms:
Gram atomic mass = Mass (in grams) / Molar mass of the element
Gram atomic mass of iodine = 0.0254 grams / 126.90 grams/mole
This will give you the number of gram atoms of iodine.
4. Calculate the number of gram molecules:
Gram molecular mass = Mass (in grams) / Molar mass of the compound
Since we are dealing with pure iodine (I2), the molecular mass is twice the molar mass of iodine.
Gram molecular mass of iodine = 0.0254 grams / (126.90 grams/mole × 2)
This will give you the number of gram molecules in 25.4 milligrams of iodine.
Remember, Avogadro's number (6.022 × 10^23) is used to convert between grams atoms and gram molecules.