What is the coefficient of oxygen after balancing the following equation? ___ P

Question

What is the coefficient of oxygen after balancing the following equation? ___ P (s) ___ O_2 (g) rightarrow ___ P_2 O_5 (s) 1 2 4 5 none of these What is the coefficient of hydrogen gas after balancing the following equation? __Mn (s) + ___ H_2 SO_4 (aq) rightarrow ___ Mn SO_4 (aq) + ___ H_2 (g) 1 2 3 4 none of these When the following equation is balanced, the coefficient of Al_2 O_3 is ___. Al_2 O_3 (s) + C (s) + Cl_2 (g) rightarrow ACl_3 (s) + CO (g) 1 2 3 4 5 What is the coefficient of KNO_3 after balancing the following equation? ___ Au (NO_3)_3 (aq) + ___ K_2 CrO_4 (aq) rightarrow ___ Au_2 (CrO_4)_3 (s) + ___ KNO_3 (aq) 1 2 3 6 none of these

Explanation / Answer

Ans 28. D . 5

The balanced reaction will be ,

4P + 5O2 = 2P2O5

So the coefficient of oxygen gas is 5 , and that of phosphorus and P2O5 is 4 and 2 respectively .

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