What mass of carbon dioxide, co2(g), in g, is produced when 5.0 g of calcium carbonate, caco3 (s), reacts completely with hydrochloric acid, HCl (aq)? CaCO3 (s) + 2 HCI (aq) → CaCl2 (aq) + H2O (l) + CO2 (g)

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

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?

May someone me with these science questions