A gas X has a density of 1.187[tex]gdm^-3[/tex] at 1.01 atm. & 35[tex]^oC[/tex]. Gas X contains 79.8% by mass of C & 20.2% by mass of H. Find the empirical formula of X.(adsbygoogle = window.adsbygoogle || []).push({});

Here are my steps:

mole ratio of C to H = 79.8/12.01 : 20.2/1.008

= 7: 20

In that case, its empirical formula is [tex]C_{7}H_{20}[/tex] while I don't think there is a gas with this formula, the closest one is [tex]C_{7}H_{16}[/tex]. Can anyone help me with it?

I know what's wrong now....I have mistaken it as the molecular formula...hheee...being silly...so the answer should be [tex]CH_{3}[/tex].

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# Empirical formula

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