What do we call a factor that controls a trait

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

Salt in oceans comes from and of rocks

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2