[0+O_(2)],[vec Fe_(2)O_(3)],[Al_(2)O_(3)+H_(2)O]

Balance the following equations: (i) Na+O_(2)toNa_(2)O (ii) H_(2)O_(2)toH_(2)O+O_(2) (iii) Mg(OH)_(2)+HCl to MgCl_(2)+H_(2)O (iv) Fe+O_(2)to Fe_(2)O_(3) (v) Al(OH)_(3)toAl_(2)O_(3)+H_(2)O (vi) NH_(3)+CuOtoCu+N_(2)+H_(2)O (vii) Al_(2)(SO_(4))_(3)+NaOHto Al(OH)_(3)+Na_(2)SO_(4) (viii) HNO_(3)+Ca(OH)_(2)toCa(NO_(3))_(2)+H_(2)O (ix) NaOH+H_(2)SO_(4)toNa_(2)SO_(4)+H_(2)O (x) BaC l_(2)+H_(2)SO_(4)toBaSO_(4)+HCl

Which reaction (s) occurs during calcination (a) CaCO_(3)toCaO+CO_(2) (b) 2FeS_(2)+(11)/(2)O_(2)toFe_(2)O_(3)+4SO_(2) (c ) Al_(2)O_(3).2H_(2)OtoAl_(2)O_(3)+H_(2)O (d) ZnS+(3)/(2)O_(2)toZnO+SO_(2) correct option are

What do you mean by a balanced chemical equation ? Balance the following equations : (i) Al + Fe_(2)O_(3) to AI_(2)O_(3) +Fe (ii) Na +H_(2)O to NaOH + H_(2) (iii) Fe + O_(2) to Fe_(3)O_(4)

In the following sets of reactants which two sets best exhibit the amphoteric characters of Al_(2)O_(3). xH_(2)O ? Set 1: Al_(2)O_(3). xH_(2)O (s) and OH^(-) (aq) Set 2: Al_(2)O_(3).xH_(2)O(s) and H_(2)O(I) Set 3: Al_(2)O_(3). xH_(2)O(s) and H^(+) (aq) Set 4: Al_(2)O_(3).xH_(2)O(s) and NH_(3) (aq)

According to the following reaction, calculate the amount of Al which is required to form 0.5 mole of sodium meta-aluminate. 4Al+3O_(2)rarr 2Al_(2)O_(3)" , "Al_(2)O_(3)+2NaOHrarr 2NaAlO_(2)+H_(2)O

Al(s) and Fe(s) are oxidised by oxygen to form Al_(2)O_(3)(s) and Fe_(2)O_(3)(s) respectively. If the standard enthalpy of formation of Al_(2)O_(3)(s) and Fe_(2)O_(3)(s) are -1669.8 " kJ mol"^(-1) and -824.2 " kJ mol"^(-1) respectively, calculate the change in enthalpy of the given reaction : 2Al(s)+Fe_(2)O_(3)(s) to 2Fe(s)+Al_(2)O_(3)(s)