Hydrochloric acid reacts with calcium metal to produce calcium chloride and hydrogen gas. The unbalanced equation
is: HCl (aq) + Ca (s) → CaCl2 (aq) + H2 (g) How many grams of hydrogen gas are produced when 18.25 g of HCl reacts completely with calcium?

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as

What characteristics does a earthquake have