Chemistry
fe2o3 + 3 c → 2 fe + 3 co

how many grams of carbon are needed to completely react with 125 g of fe2o3(mm in g/mol: fe2o3= 159.7, c= 12.01, fe= 55.85, co= 28.01) ?

a) 80.6 g
b) 28.2 g
c) 65.7 g
d) 6.0g

Which best describes how johannes kepler developed his laws of planetary motion

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world