If 42.4g of Al react with excess O2 and 67.3g of Al2O3 are produced, what was the percent yield of Al2O3? The Balanced Equation is 4 Al + 3 O2 --> 2 Al2O3

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of