Question

plzzzzzzzzzzz..............

Answer 1

______________________________________________________

Remember this formula :

Gram Atoms = Mass ( in g ) / Relative atomic mass.

Given :

gram atoms = 2.5

g atomic mass of oxygen is 16 g [ atomic mass of O ]

So : apply the formula :

                                     ==> 2.5 = m / 16 g

                                     ==> m = 16 g × 2.5

                                      ==> m = 40 g

The mass of given gas is 40 g

Hope it helps you

___________________________________________________________________

Answer 2

$\huge\red{heya!!!!!}$