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Acetylene is used in oxyacetylene gas welding. Calculate the empirical formula for acetylene given its percent composition:

92.25% C and 7.75% H.

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sebassandin

Answer:

[tex]CH[/tex]

Explanation:

Hello!

In this case, given the percent composition of C and H in acetylene, in order to find its empirical formula we compute moles of C and H assuming those percentages as masses:

[tex]n_C=92.25gC*\frac{1molC}{12.01gC} =7.68molH\\\\n_H=7.75gH*\frac{1molH}{1.01molH}=7.67molH[/tex]

Next, since they have the same number of moles we infer they are in a 1:1 subscript ratio on the empirical formula, where is therefore:

[tex]CH[/tex]

Best regards!

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