Empirical Formula (HW problem F.11, part a)

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Steven Garcia 1H
Posts: 79
Joined: Fri Sep 28, 2018 12:16 am

Empirical Formula (HW problem F.11, part a)

Postby Steven Garcia 1H » Fri Oct 05, 2018 1:22 am

After I changed the mass percentages of each element into masses, I then converted these masses into moles by dividing the masses of each element by their corresponding molar masses. In the end, I ended up with a ratio of 2.95:1:5.91 for Na:Al:F. Is it safe to round these ratio values to whole numbers? How close to a whole number does a value have to be to allow for this rounding?

Vanadium Wang 4H
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Empirical Formula (HW problem F.11, part a)

Postby Vanadium Wang 4H » Fri Oct 05, 2018 1:28 am

Yes, it is safe to round these ratio values into whole numbers. I believe that values can be off .1 and rounding would still produce a valid answer.

Sona Hakobyan 3J
Posts: 45
Joined: Fri Sep 28, 2018 12:25 am

Re: Empirical Formula (HW problem F.11, part a)

Postby Sona Hakobyan 3J » Fri Oct 05, 2018 3:28 am

Yes it is safe to round up these numbers. I've heard that the numbers have to be within 5 percent of the next closest integer to be rounded. .


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