Ni(NO3) 2 + 2 NaOH -> Ni(OH) 2 + 4NaNO3 , Ni(NO3) 2 + 2 NaOH -> Ni(OH) 2 + 2 NaNO3 , Ni(NO3) 2 + NaOH -> Ni(OH) 2 + 2 NaNO3 which equation is balanced correctly?
by 
justcallme9
ANSWERS: 1
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The first equation cannot be correct because you start with two nitrogen (N) atoms from the (NO3)2 groups and end up with 4 from the 4NaNO3. The third equation does't balance because you start with 7 oxygen (O) atoms - (NO3)2 makes six plus the one from the NaOH - but you end up with 8 - two from (OH)2 and six from 2NaNO3. So the equation that balances is the middle one.
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