Q1. Chromium is produced by reacting its oxide with aluminium. If 354 g of Cr2O3 and 158 g of Al react to form 204 g of Al2O3, how many grams of Cr are formed?
Q2. A cardinal (Richmondena cardinalis) of mass 4.5×10-2 and the baseball of mass 0.135 have the same kinetic energy. What is the ratio of cardinal's magnitude of momentum to the baseball's?