## when to multiply empirical formula [ENDORSED]

Divya Pimparkar 1E
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

### when to multiply empirical formula

When you divide the molar mass of the molecular formula by the molar mass of the empirical formula, if i get 3.5, do i multiply by 4 or 3?

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

### Re: when to multiply empirical formula

You multiply by the smallest possible value; that will give you a whole number.

Dayna Pham 1I
Posts: 98
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 3 times

### Re: when to multiply empirical formula

If you are at 3.5, you can multiply by 2 to get 7! Hope this helps.

Posts: 96
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 2 times

### Re: when to multiply empirical formula

In these problems, you always want to make sure you are multiplying by a whole number to ensure you have whole numbers of atoms.

Maria Solis Disc 1G
Posts: 63
Joined: Fri Sep 28, 2018 12:27 am
Been upvoted: 2 times

### Re: when to multiply empirical formula

You would multiple all the coefficients by 7, since you can't have 3.5 as a coefficient. You can't use 3 or 4 because that wouldn't uphold the exact proportion of 3.5.

Rehan Chinoy 1K
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

### Re: when to multiply empirical formula  [ENDORSED]

You want to make sure all the stoichiometric coefficients are whole numbers. So if you have 3.5, you will most likely multiply all of the coefficients by 2 or a multiple of 2 to ensure whole numbers.

AlyssaBei_1F
Posts: 99
Joined: Fri Sep 28, 2018 12:17 am

### Re: when to multiply empirical formula

You want to multiply by the smallest possible number that will give you a whole number. I would multiply 3.5 by 2 to get 7.

Mayaal_Khan_4H
Posts: 41
Joined: Fri Sep 28, 2018 12:28 am

### Re: when to multiply empirical formula

You need to multiple the answer by the smallest possible number which would turn the answer to a whole number. For example, if your answer is 1.33, you will have to multiply it by 3 to get 4.

EllaBerry
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

### Re: when to multiply empirical formula

Always multiply by the smallest number possible to get a whole number. In this case it sounds like you would multiply by 2 so that the 3.5 would turn into 7, a whole number.

Julia Jones 1G
Posts: 29
Joined: Fri Sep 28, 2018 12:16 am

### Re: when to multiply empirical formula

If you get a number like 3.5, multiply everything by 2 to get the whole number of 7 (this will be your subscript for the element in the molecular formula)