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__NaCl + __CaF2 → __NaF +__CaCl2

In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?
A
2, 1, 3, 1

B
2, 2, 2, 2

C
2, 1, 2, 1

D
1, 3, 1, 3

Respuesta :

camiccc99
The answer is C. 2, 1, 2, 1
This way both sides of the reaction have the same amount of atoms of each element:
Na = 2 atoms
Cl = 2 atoms
Ca = 1 atom
F = 2 atoms
following the law of conservation of mass which says the mass remains constant, it can't be added or removed

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