If 8.7 moles of Al are reacted with excess Fe2O3 and 19.75 grams of Fe are formed, what is the percent yield of the reaction? 2Al(s)+ Fe2 O3 (s) = 2Fe(s) + Al2 O3(s)

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

How many grams of phosphorus are contained in 5.09 moles of phosphorus?