How many molecules are present in 385.55g of no2?

5.05x10^24 molecules

Explanation:

1. Find the total mass of the compound

14 grams+32 grams= 46 grams per mole

2. Find the moles

385.55 g/ 46 g per mol= 8.38 moles

3. Multiply by Avogadro's Number (6.022 x 10^23)

8.38 moles x 6.022 x 10^23= 5.05x10^24 molecules

the answer is a. co2, this would be colder than the : )

explanation:

sry but any answer choices