How many grams of Al are needed to react with 91.8 grams of FeO
3FeO + 2Al —> 3 Fe +Al2O3

Ans : 22.86 gm of Aluminium

Solution,

                        3FeO + 2Al ---> 3 Fe +

Given                   3          2                    

Find                    1.27       x

By the given gms of FeO find its mole and put the moles in the find,

                  Given mass of FeO is 91.8

                   Molecular mass of FeO is 71.8

                                         n =  

                                         n = 1.27 moles of FeO  

Now solve for x,

                             x = 0.85 moles

These are just moles of Aluminium that we need to react with FeO, so to find Grams of Aluminium we need,

                                Mass = moles x molecular mass

                                Mass = 0.85 x 27(atomic mass of Al)

                                Mass = 22.86 grams of aluminium is what we need

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.