Which of the following reactions obeys the Law of Conservation of Atoms?

H2O → H2 + O2
CuSO4 + Zn → ZnCl2 + Cu
Zn + HCl → ZnCl2 + H2
PbCl2 + Al → AlCl3 + Pb
Zn + 2HCl → H2 + ZnCl2

Question

Which of the following reactions obeys the Law of Conservation of Atoms?

H2O → H2 + O2
CuSO4 + Zn → ZnCl2 + Cu
Zn + HCl → ZnCl2 + H2
PbCl2 + Al → AlCl3 + Pb
Zn + 2HCl → H2 + ZnCl2

Deamoura · Answer

I thought it was the second one

Deamoura · Answer

@Gdeinward

Gdeinward · Answer

I dont know on that

JSVSL7 · Answer

Which one is balanced?

Deamoura · Answer

idk @JSVSL7

JSVSL7 · Answer

I can't answer rn I'll be back in a bit

Narad · Answer

There is only one reaction that is balanced.

Check that you have the same number of atoms on the LHS and on the RHS?

mhchen · Answer

Conservation of atoms just means that atoms aren't destroyed/created, only transferred

H2O has 2 hydrogens and 1 oxygen
H2 + O2 has 2 hydrogens and 2 oxygens.
They don't match.

CuSO4 + Zn has 1 Cu, 1S, 4O,1 Zn
ZnCl2 + Cu, has 1 Zn, 2 Cl and 1 Cu
No match either

I think you get what I'm doing right?