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1)C3H8 + 5O2 → 3CO2 + 4H2O.
L.H.S. R.H.S.
C = 3. C = 3.
H = 8. O = 2×3 = 6+4 = 10.
O = 5×2=10. H = 2×4=8.
2) 2Al + Fe3N2 → 2AlN + 3Fe.
L.H.S. R.H.S.
Al = 2. Al = 2.
Fe = 3. Fe = 3.
N = 2. N = 2.
3) 2Na + Cl2 → 2NaCl.
L.H.S. R.H.S.
Na = 2. Na = 2.
Cl = 2. Cl = 2.
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