150cm^3 SO2 and 100cm^3 react together 1) state which reactants is in excess
2) state the volume of SO3 that could form this quanitites

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle