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ratios in calculating empirical formulae? watch

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    if you got an empirical ratio of say 1 to 1.5 would you round up to 1 to 2 or times both by 2 for 2 to 3. how do you know when to round and when to times for example if it were 1 to 2.44 or 1 to 1.64 how would you know what to do?
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    Times 1 to 1.5 by 2 to get 2 to 3 since the definition of empirical formula is the whole number ratio. I think if it rounds closer to 1.5 then you multiply but when its closer to a whole number (like 1 to 1.81) then round to 1 to 2.
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    (Original post by jonjoshelvey21)
    if you got an empirical ratio of say 1 to 1.5 would you round up to 1 to 2 or times both by 2 for 2 to 3. how do you know when to round and when to times for example if it were 1 to 2.44 or 1 to 1.64 how would you know what to do?
    I agree with Spidle, double the values to get 2:3.

    For your other examples, look for factors that may give you other ratios.
    2.44 is close to 2.5. Double both to get a ratio that is likely 2 : 5.
    1:1.64 ? I would suggest multiplying both by 3 to get a ratio of close to 3 : 5

    The ratios you get in exams will usually be very close to an exact ratio. Look for the factor that makes the ratio work.
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    thank you
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