If `(3)/(2)` mol of `O_(2)` combine with `Mg` to form `MgO` . Find mass of `Mg` that has combined :
`2Mg+O_(2)rarr2MgO`

1.5 mol of O_(2) combine with Mg to form MgO. The mol of Mg that has combined is

1.5 mol of O_(2) combine with Mg to form oxide MgO. The mass of Mg (at mass 24) that has combined is

1.5 mol of O_(2) combines with Mg to form oxide MgO. The mass of Mg (at. Mass 24) that has combined is

2Mg + O_(2) to 2MgO

Mg_(3)N_(2) + H_(2)O to

In the reaction 3Mg + N_2 rarr Mg_3N_2

Heats of formation of SiO_(2) and MgO are -48.24 and -34.7 kJ respectively. The heat of the reaction : 2Mg+SiO_(2) rarr 2MgO+Si is