Convert 6.42x10^23 atoms a pure substance to moles of that substance. That is all it says. Please help. Thank you.
1 mol contains of anything contains 6.02E23 individual anythings. So
mols = 6.42E23/6.02E23 = ?
To convert atoms of a pure substance to moles, you need to use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, ions, etc.).
In this case, you have 6.42 x 10^23 atoms of a pure substance. To convert this to moles, divide the number of atoms by Avogadro's number:
Number of moles = Number of atoms / Avogadro's number
Plugging in the values:
Number of moles = (6.42 x 10^23) / (6.022 x 10^23)
Calculating the division:
Number of moles = 1.067
Therefore, 6.42 x 10^23 atoms of a pure substance is equivalent to approximately 1.067 moles of that substance.