Determine the numbers of atoms in each of the following 5.40 g b 0.250 mol k 0.0384 mol k 0.02550 g pt 1.00 x 10^-10 g au,

a) 5.40 g B : atoms

b) 0.250 mol K : atoms

c) 0.0384 mol K : atoms

d) 0.02550 g Pt: atoms

e)   Au: atoms

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.

To calculate the moles, we use the equation:

a) 5.40 g B

1 mole of boron contains = atoms

Thus 0.5 moles  of boron contain = atoms

b) 0.250 mol K

1 mole of potassium (K) contains = atoms

Thus 0.250 moles of potassium contain = atoms

c) 0.0384 mol K

1 mole of potassium (K) contains = atoms

Thus 0.0384 moles of potassium (K) contain = atoms

d) 0.02550 g Pt

1 mole of platinum contains = atoms

Thus of platinum contain= atoms

e) Au,

1 mole of gold contains = atoms

Thus of platinum contain= atoms

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023