3.0m3 of sulfer dioxide is reacted with 2.0dm3 of oxygen . What volume of sulfur trioxide is form?

3.0 dm^3 of sulphur trioxide is formed

Explanation:

From Gay Lussac's law of combining volumes;

The equation is;

                                                  SO2(g) + 1/2O2(g) > SO3(g)

Reacting volumes                       1 vol          1/2 vol             1 vol

Initial volumes                           3.0 dm^3    2.0 dm^3       0.0 dm^3

Final volumes                            0.00 dm^3  1.5 dm^3        3.0 dm^3

Hence, 3.0 dm^3 of sulphur trioxide is formed.

they both have a y in them

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.