when balancing the equation in basic Number 15 When balancing the equation below

Question

when balancing the equation in basic Number 15 When balancing the equation below in basic conditions what to the sum of all the coefficients in the equations? Zn + NO_3^-1 rightarrow ZnO_2^-2 + NH_3 (basic) 19 7 12 2 10 Given the following reaction: BaCO_3 (s) rightarrow BaO(s) + CO_2 (g) Calculate Delta H degree (kJ) Ba(s) + 1/2 O_2 (g) rightarrow BaO(s) Delta H degree = -553,50 kJ 2Ba (s) + 2CO_2 (g) + O_2 (g) rightarrow 2BaCO_3 (s) Delta H degree = -1645.0 kJ -1929.5 kJ -1376.0 kJ +269.00 kJ +822.5 kJ Examine the following phase diagram and determine what phase exists at point F. vapor 4 liquid vapor liquid solid None of these are correct

Explanation / Answer

Zn to zn2+ ----- change of two electrons

No3 - to NH3 ---- change of 8 electrons

Hence to equalize the total no. Of electron loss with total electron gain multiply the first zinc's equation with 4.

4 zn + No3- => 4 Zn2+ + NH3

Hence sum of all coff. = 4+1+4+1= 10

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