Convert each quantity to an amount in moles:

a) 4.27 x 10^21 atoms of He
b) 7.39 x 10^23 molecules of ICl

a) There are 6.02 x 10^23 atoms in a mole of atoms.

b)There are 6.02 x 10^23 molecules in a mol of molecules.

There are 6.02 x10^23 of anything in a mole of anything

To convert the given quantities to moles, we need to use Avogadro's number (6.022 x 10^23) as a conversion factor. Here's how you can do it step-by-step:

a) 4.27 x 10^21 atoms of He:
We'll use Avogadro's number to convert atoms to moles.
1 mole of any substance contains 6.022 x 10^23 atoms.

Conversion:
1 mole of He = 6.022 x 10^23 atoms of He

To find the number of moles, divide the given number of atoms by Avogadro's number:
The number of moles of He = (4.27 x 10^21 atoms of He) / (6.022 x 10^23 atoms/mol)

b) 7.39 x 10^23 molecules of ICl:
Similar to the previous example, we'll use Avogadro's number to convert molecules to moles.
1 mole of any substance contains 6.022 x 10^23 molecules.

Conversion:
1 mole of ICl = 6.022 x 10^23 molecules of ICl

To find the number of moles, divide the given number of molecules by Avogadro's number:
The number of moles of ICl = (7.39 x 10^23 molecules of ICl) / (6.022 x 10^23 molecules/mol)

Now you can calculate the number of moles using the provided formulas.

To convert the quantities to an amount in moles, you need to use Avogadro's number. Avogadro's number is defined as 6.022 x 10^23 particles per mole, where a particle can be an atom, a molecule, or an ion.

a) To convert 4.27 x 10^21 atoms of He to moles, divide the quantity by Avogadro's number:
4.27 x 10^21 atoms of He / (6.022 x 10^23 atoms/mol) = 0.0071 mol of He

b) To convert 7.39 x 10^23 molecules of ICl to moles, divide the quantity by Avogadro's number:
7.39 x 10^23 molecules of ICl / (6.022 x 10^23 molecules/mol) = 1.23 mol of ICl

Therefore, the converted amounts are:
a) 0.0071 mol of He
b) 1.23 mol of ICl