w C3H8 + x O2 → y H20 + z CO2
The above equation represents a balance chemical reaction, the vaule of w+x+y+z is _______.
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Balance the following equation, and hence choose the values of the coefficients v, w, x, y, z: yHCl(aq)+wMnO2(s)→xMnCl2(aq)+yCl2(g)+zH2O(l)
Balance the following equation, and hence choose the values of the coefficients w, x, y, z: wFe2O3(s)+xC(s)→yFe(s)+zCO2(g)