Avogadros's Day Puzzle 3!

12345678
Across
  1. 1. Conformation of cyclohexane
  2. 3. The powerhouse of a cell
  3. 4. Number of bits in a byte
  4. 5. Fourth number in Avogadro's constant
  5. 6. 0.454 kilograms
  6. 8. Type of cheese, includes brie and camembert
Down
  1. 1. A long passageway or hall, esp. one onto which several rooms open
  2. 2. Product of incomplete combustion, also chimney grime
  3. 4. Abbreviation of a 2022 film starring Michelle Yeoh
  4. 7. The (alleged) inventor of calculus, also a unit