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PSYCHO15rus [73]
3 years ago
15

which would have the longer wavelength, a photon with energy of 4.59 x 10^-19 J or a photon with energy of 3.01 x 10^-19 J

Chemistry
1 answer:
Eduardwww [97]3 years ago
6 0
Compare them accordingly with the formula of E=hc/wavelength
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3 years ago
a compound has an empirical formula of CH2 what is the molecular formula if it's molar mass is 252.5 grams/mol
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Empirical formula is the simplest ratio of components making up the compound. the molecular formula is the actual ratio of components making up the compound.

the empirical formula is CH₂. We can find the mass of CH₂ one empirical unit and have to then find the number of empirical units in the molecular formula.

Mass of one empirical unit - CH₂ - 12 g/mol x 1 + 1 g/mol x 2 = 12 = 14 g

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number of empirical units = molar mass / mass of empirical unit

                                           = \frac{252.5 g/mol}{14 g}

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molecular formula is C₁₈H₃₆  

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