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Calcium metal reacts with fluorine gas to form solid calcium fluoride. When the reaction is balanced, what coefficient is in front of fluorine gas?

A. 1
B. 2
C. 7
D. 3

Respuesta :

Neetoo

Answer:

B= 2

Explanation:

Chemical equation:

Ca + F      →   CaF₂  

Balance chemical equation:

Ca + 2F      →   CaF₂  

Step 1:

Ca + F      →   CaF₂

Left hand side             right hand side

Ca = 1                             Ca = 1

F = 1                                F = 2

Step 2:

Ca + 2F      →   CaF₂

Left hand side             right hand side

Ca = 1                             Ca = 1

F =  2                              F = 2

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