|
Chemistry Regents June 2005 - Question 77 |
 |
 |
Correct Answer: 0.5 moles
Answering the Question:
The Cylinder contains 22g of CO2. One molecule of CO2 has a molecular mass of 12(mass of carbon) + 2x16 (mass of oxygen) = 44.
What that tells us is that 1 mole of CO2 has a weight of 44g, as 1 mole of any substance is equal to the gram molecular weight of that substance. This means 1g of CO2 has 1/44 moles.
Therefore 22g of CO2 has 1/44 x 22 moles = 0.5 moles
|
You must be a registered user to post comments.
|
