In recent years the concentration of co2 in the atmosphere has increased to approximately 350 ppm based on mass content. given the approximate composition of air: o2 – 20.36% wt co2 – 0.035% wt n2 – 76.595% wt ar – 0.01% wt h2o – 3.0% wt a) determine the average molecular weight of air. b) determine the composition of air in mol %. c) determine the ppm of co2 based on mole content.

Subduction zones occur on earth where dense oceanic crust dives under more buoyant continental crust. these boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. all of this is further evidence for the a) big bang theory b) origin of the species eliminate c theory of plate tectonics d theory of natural selection 4 sedimentary rocks found high in the himalayen mountain

•what conclusions can you make about the relationship between the volume of a gas and its temperature? • what conclusions can you make about the relationship between the volume of a gas and its pressure? • what possible variables have you not accounted for? as you did the procedures, is it possible that the atmospheric pressure may have changed? if it did change over the course of your experiment, then how would your results have been affected?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate according to the following equation: