What mass measured in grams of iron would be produced if 4.0 moles of aluminum reacts with an excess of Fe₃O₄? 8Al + 3Fe₃O₄ → 4Al₂O₃ + 9Fe A. 224g
B. 252g
C. 504g
D. 448g

List four observations that indicate that a chemical reaction may be taking place

One does not belong why? ice, gold ,wood ,diamond and table salt

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.