How many grams of Al2O3 are formed when 30.5 g of O2 reacts with aluminum? 4 Al + 3 O2 --> 2 Al2O3

can you attach a picture of the lettuce? : )

gravity causes stares to cluster i think so

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.