http://map.gsfc.nasa.gov/news/
http://science.howstuffworks.com/dictionary/astronomy-terms/dark-matter-dark-energy.htm
Come in with a short paragraph summarizing what you've learned. Feel free to use more sources if you don't find these sufficient for understanding the material.
Section 10: Do these!:
1. Write the balanced equation for the combustion of ethyl alcohol,
C2H5OH. If 3.662 moles of ethyl alcohol are burned, how many moles of water can be formed?
2. In the reaction P4 + 5 O2 ® 2 P2O5, how many moles of oxygen are consumed each time 0.500 mol of P2O5 is formed?
3. In the reaction in question 2 above, how many grams of diphosphorus pentoxide could be formed from 0.34 moles of oxygen?
4. How many grams of ammonia (NH3) will be produced when 25.0 g of CaCN2 react with excess water in the reaction below?
CaCN2 + 3 H2O ® CaCO3 + 2 NH3