1 The alkanes are generally unreactive. Their reactions include combustion, substitution and cracking.
(a) The complete combustion of an alkane gives carbon dioxide and water.
(i) 10 cm3
of butane is mixed with 100 cm3
of oxygen, which is an excess. The mixture
is ignited. What is the volume of unreacted oxygen left and what is the volume of
carbon dioxide formed?
C4H10(g) + 6 O (g) 2 2
1 4CO2(g) + 5H2O(l)
cm3 Volume of oxygen left =
Volume of carbon dioxide formed = cm3

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?