ann2etticdpRoby ann2etticdpRoby

30-12-2015
Chemistry

contestada

Which equation shows a conservation of mass?
(1) Na + Cl2 --> NaCl
(2) Al + Br2 --> AlBr3
(3) H2O --> H + O2
(4) PCl5 --> PCl3 + Cl2

Respuesta :

Billymkhoi Billymkhoi

30-12-2015

(4) PCl5--> PCl3+ Cl2 is the correct answer because we both have 1 P atom and 5 Cl atoms on both sides, and thus the masses of the elements don't change.
Hope this would help~

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