Consider the combustion of hydrogen gas in the presence of oxygen gas represented by the following balanced chemical equation:2 H2(g) + O2(s) → 2 H2O(g)How many moles of O2 are needed to completely react with hydrogen gas and produce g H2O?_______________ mol O2. Do NOT enter unit.

Where is Hadar located? Why is Hadar so significant? 

Lineages: Episode 7 Questions

For each species, indicate what type of movement each limb is responsible for: 

Most of the coal that we burn today was formed from the great coal forming swamps and forests in the ________ period which was ________ million years ago.  

Culture: Episode 11 Questions

Anatomy: Episode 5 Questions

What do they hypothesize was the reason that Neanderthals went extinct? 

How many million years did the Cenozoic era span?

Compare the anatomy of a butterfly and a bird wing. How are they different in form? Be specific.