Empirical formula question

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Kaihan_Danesh_2J
Posts: 89
Joined: Wed Sep 30, 2020 9:40 pm

Empirical formula question

Postby Kaihan_Danesh_2J » Sun Nov 01, 2020 7:11 pm

Do empirical formulas have to have whole numbers or can they be numbers like 1.5, 2.5, etc

Sabrina Galvan 3J
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Joined: Wed Sep 30, 2020 9:35 pm
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Re: Empirical formula question

Postby Sabrina Galvan 3J » Sun Nov 01, 2020 7:19 pm

Empirical numbers have to contain whole numbers since you can't have a fraction of an atom. Therefore, if you get nonwhole numbers in your conversation to the empirical formula, multiple the ratios by whole numbers until your product is close to the nearest whole number!

Natalie Do 3F
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Joined: Wed Sep 30, 2020 10:03 pm

Re: Empirical formula question

Postby Natalie Do 3F » Sun Nov 01, 2020 8:03 pm

And just to add to that, they have to be the most possibly reduced whole numbers so your example 1.5 and 2.5 would have to be 3 and 5, not 6 and 10 for example.

Mina Tadros 3L
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Joined: Wed Sep 30, 2020 9:38 pm

Re: Empirical formula question

Postby Mina Tadros 3L » Sun Nov 01, 2020 8:18 pm

When calculating empirical formulas, you will have to have them as whole numbers. Thus, when calculating empirical formulas, you would have to multiply every single element in a way that gets rid of any fraction.

LarisaAssadourian2K
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Joined: Wed Sep 30, 2020 9:34 pm

Re: Empirical formula question

Postby LarisaAssadourian2K » Sun Nov 01, 2020 8:22 pm

All empirical formulas need to be in whole numbers. However, keep in mind that they should also be reduced to the lowest possible whole numbers as well, meaning that the numbers don't all share a common factor.

Rayna Irving 2C
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Joined: Wed Sep 30, 2020 9:33 pm

Re: Empirical formula question

Postby Rayna Irving 2C » Sun Nov 01, 2020 8:30 pm

I agree with what was said, if you end up with a fraction in your empirical formula, multiply it by whatever number gets the fraction to a whole number. Then don't forget to multiply all of your other numbers in the empirical formula by that same value to make sure everything is equal.

IshanModiDis2L
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Joined: Wed Sep 30, 2020 9:49 pm

Re: Empirical formula question

Postby IshanModiDis2L » Sun Nov 01, 2020 9:06 pm

Empirical formulas do need to be whole numbers as you cannot have a fraction of an atom. That is why we multiply to get a whole number ratio (ex. 1.5x2=3) but it is key to make sure that it is in its lowest whole number ratio, otherwise it will be considered a molecular formula.

Susan Chamling 1F
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Joined: Wed Sep 30, 2020 9:42 pm

Re: Empirical formula question

Postby Susan Chamling 1F » Mon Nov 02, 2020 12:04 am

There can only be whole numbers in an empirical formula, as it is the simplest positive integer ratio of atoms in a compound.


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