Gas Volumes

Question 1

what are volumes of gas measured in?

Answer 1

centimetres (cm3) OR decimetres (dm3)

Question 2

how do you convert from cm3 to dm3?

Answer 2

divide by 1000

Question 3

how do you calculate a mole of gas from its volume alone?

Answer 3

moles = volume (dm3)/24dm3

(the denominator is 24dm3 for every gas)

Question 4

how do you calculate the volume of X needed to react with Y

Answer 4

1. concert mass of Y into moles of Y
2. use the mole ratio from the balancing numbers in the equation
3. convert moles of X into volume of X

Question 5

what do you do when you are asked to calculate gas moles?

Answer 5

use the mole ratio from the balancing numbers in the equation