Answer:
So, there are approximately 2.4 x 10^24 atoms in 11.7 grams of potassium dichromate.
Step-by-step explanation:
To determine the number of atoms in a given amount of a substance, you can use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mole. To use this number, you first need to know the molar mass of the substance, which is the mass of one mole of the substance in grams.
The molar mass of potassium dichromate is 294.185 g/mol. So, to find the number of moles in 11.7 grams of potassium dichromate, you would divide 11.7 by 294.185. This would give you a value of 0.0399 moles.
To find the number of atoms in 11.7 grams of potassium dichromate, you would then multiply the number of moles (0.0399) by Avogadro's number (6.022 x 10^23 atoms/mole). This would give you a value of 2.4 x 10^24 atoms.