## Multiplying to get an integer in the empirical formula

Dayna Pham 1I
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Joined: Fri Sep 28, 2018 12:16 am
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### Multiplying to get an integer in the empirical formula

What’s the threshold of rounding up and down when calculating the empirical formula versus multiplying to get a whole number?

Is it 0.75 and up, round up; 0.25 and down, round down? When do we know to multiply to get a whole number for the empirical formula?

Jayde Felix 4H
Posts: 59
Joined: Fri Sep 28, 2018 12:28 am

### Re: Multiplying to get an integer in the empirical formula

I believe that you know to multiply to get a whole number as your final step in finding the empirical formula.

Annalyn Diaz 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

### Re: Multiplying to get an integer in the empirical formula

For an empirical formula, the numbers must be whole numbers, not numbers like 1.33 or 2.5, etc. In such case that you don't get a whole number, you would multiply that by another number to make it whole. But to address your question regarding the threshold for rounding, I believe Dr. Lavelle mentioned that rounding up or down from a number is only acceptable if the rounded number is less than 5% error. hope this helps!

Sarah Zhao 4C
Posts: 64
Joined: Fri Sep 28, 2018 12:28 am

### Re: Multiplying to get an integer in the empirical formula

Multiply anything that isn't less than .2 away from a whole number

Sarah Zhao 4C
Posts: 64
Joined: Fri Sep 28, 2018 12:28 am

### Re: Multiplying to get an integer in the empirical formula

Multiply anything that isn't less than .2 away from a whole number