Respuesta :

umairwaheed8888776

Answer:

molar ratio= 4:3

                   since al moles needed so we will leave al in moles and convert o into grams

             4: since 1 mole of oxygen is 16g so 3 moles is 48

4:48

put given data

x:90

90*4/48

7.5 moles          

Explanation: