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natka813 [3]
2 years ago
14

Which of the following is not a valid conversion factor?

Chemistry
1 answer:
Snezhnost [94]2 years ago
7 0
The last option, 1 meter/ 10 millimeters is not a valid conversion factor.

It should be 1000m Instead of 1 meter/ 10 millimeter since 1m=1000mm
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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  - CH₂ x 18 = C₁₈H₃₆                                            

molecular formula is C₁₈H₃₆  

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