Answer:
321.27 grams.
Step-by-step explanation:
To determine the weight of 4.56 x 10^24 formula units of lithium chloride, we first need to know the molar mass of lithium chloride.
Lithium chloride (LiCl) has a molar mass of approximately 42.39 g/mol. This means that one mole of lithium chloride weighs 42.39 grams.
To convert formula units to moles, we need to use Avogadro's number, which is approximately 6.022 x 10^23 particles per mole.
So, to find the number of moles in 4.56 x 10^24 formula units of lithium chloride, we can divide by Avogadro's number:
4.56 x 10^24 formula units / (6.022 x 10^23 formula units/mol) = 7.58 moles
Now that we know the number of moles, we can use the molar mass to find the weight:
7.58 moles x 42.39 g/mol = 321.27 grams
Therefore, 4.56 x 10^24 formula units of lithium chloride weigh approximately 321.27 grams.