To find the mass of 100,000 iron atoms, we need to multiply the mass of one iron atom by the number of atoms.
Given: Mass of one iron atom = 9.3x10^(-23) gram Number of atoms = 100,000
To calculate the mass of 100,000 iron atoms: Mass of 100,000 iron atoms = (Mass of one iron atom) x (Number of atoms)
Mass of 100,000 iron atoms = (9.3x10^(-23) gram) x (100,000)
Mass of 100,000 iron atoms = 9.3x10^(-23) gram x 100,000
Mass of 100,000 iron atoms = 9.3x10^(-23) gram x 10^5
To multiply numbers in scientific notation, we add the exponents: Mass of 100,000 iron atoms = 9.3 x 10^(-23 + 5) gram
Mass of 100,000 iron atoms = 9.3 x 10^(-18) gram
Therefore, the mass of 100,000 iron atoms is 9.3 x 10^(-18) gram.