Wednesday, January 27, 2010 7:07 PM
More Stoichiometry-Mass to moles
-Volume @ STP(22.4l/mol)
Examples:Q:When 1.5g of Oxygen reacts with nitrogen monoxide how many moles of nitrogen dioxide are produced?
A:O2+2NO-->2NO2
1.5gx1molO2/32.0gx2molNO2/1molO2=0.094mol of NO2
Q:If 2.0g of O2 reacts with nitrogen monoxide, what volume of nitrogen dioxide is produced at STP?
A:O2+2NO-->2NO2
2.0gx1molO2/32.0gx2molNO2/1molO2x22.4L/1molNO2=2.8L
Q:In the formation of Copper(II)Oxide, 3.5g of Copper react.How many moles of Copper Oxide are produced?
A:2Cu+O2-->2CuO
3.5gx1molCu/63.5gx2molCuO/2molCu=0.055mol CuO