Chemistry (balancing chemical equations)

[usman]

Cu + HNO3 = Cu(NO3)2 + H2O + NO
copper + nitric acid = copper(II) nitrate + water + nitrogen monoxide

 

[Zohaib Sherazi]

3 Cu + 8 HNO3 = 3 Cu(NO3)2 + 4 H2O + 2 NO

 

[usman]

Tx a lot . plz can u also give a way to tackle complex chemical equations such as this i.e. the ones is which fiddling with the coefficients doesn't yield anything. E.g. i heard about Ion-electron method but i dunno how does dat work
can u plz help

 

[Zohaib Sherazi]

Don't bother about these at O level much. Even if a very one comes it'll carry 2 marks. Stick to the strategy you r using.