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The composition by mass of a compound is: C=36.4%, H=6% and F=57.6%. Calculate the empirical formula. If the RFM is 66, what is the molecular formula?

Calculate the moles of each of the 3 elements (to get C=3.03, H=6, F=3.03). Divide these by the smallest mol calculated to get the ratio of the elements. This will get C:H:F as 1:1.978:1 = 1:2:1 and so the e...
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Answered by Sara T. • Chemistry tutor
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Why do melting points decrease down group I?

As we go down group I, the ions have larger shells and the distance between the bonding electrons and positive nucleus decreases. This decreases the overall attraction forces between the two in metal lattices.
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Answered by Chloe W. • Chemistry tutor
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What elements make up the halides?

Flourine, chlorine, bromine, iodine, astatine
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Answered by Will C. • Chemistry tutor
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What factors increase rate of reaction? (For a reaction between two reagents in solution)

For reaction in solution: Increasing concentration of either of the reagents: Greater concentration=more reagent particles in solution, so there are more collisions.Increasing Temperature: reagent particles ...
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Answered by Samuel P. • Chemistry tutor
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Explain why ionic substances have high melting points?

Ionic substances have high melting points because a lot of energy is required to break the strong, electrostatic forces of attraction between the oppositely charged ion in the ionic substance.
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Answered by Arunima B. • Chemistry tutor
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