Answered

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consider the unbalanced chemical equation hf + al -> alf3 + h2. when coefficients are added to balance the equation, which two substances have a coefficient of two?

a. hf
b. alf3
c. h2
d. al

Sagot :

Answer:

a

Explanation:

because you need to add 2 to to hf to make it equal to h2

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