A gallon of isopropanol (IPA) weighs 6,55 lbs. Since 1 lb=453.6 grams, calculate how many moles of ethanol (MM=60.1 grams per mole) are in a gallon of this substance.
It's supposed to be 6.55 lbs.
6.55 lbs x (453.6 g/lb) = ? grams.
Then mols = grams/molar mass = ?
Would the answer be 49.44 moles?
To calculate the number of moles of ethanol in a gallon of isopropanol (IPA), we need to convert the weight of IPA to grams, and then convert grams to moles using the molar mass of ethanol.
First, let's convert the weight of IPA from pounds to grams:
1 lb = 453.6 grams
Weight of IPA = 6.55 lbs * 453.6 grams/lb
Weight of IPA = 2976.48 grams
Now, we can calculate the number of moles of ethanol:
Molar mass of ethanol (C3H8O) = 60.1 grams/mole
Number of moles = Weight of IPA / Molar mass of ethanol
Number of moles = 2976.48 grams / 60.1 grams/mole
Number of moles = 49.52 moles
Therefore, there are approximately 49.52 moles of ethanol in a gallon of isopropanol (IPA).