(4) ________equation does not demonstrate the law of conservation of mass.
(a) 2Na+ Cl→ 2NaCl
(c) NaOH + HCl → NaCl + H,O H2O
(b) SnCl2 + 2FeCl2 → 2FeCl2 + Sncl.
(d) P, + 502 → 2P,00 4 10
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your answer is C.
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NaOH+HCl NaCl2+H, OH2O
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