Turn on thread page Beta
 You are Here: Home

# ratios in calculating empirical formulae? watch

Announcements
1. 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?
Posted on the TSR App. Download from Apple or Google Play
2. 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.
3. (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.
4. thank you
Posted on the TSR App. Download from Apple or Google Play

Turn on thread page Beta
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 9, 2017
Today on TSR

And I hate it

### University open days

• Heriot-Watt University
School of Textiles and Design Undergraduate
Fri, 16 Nov '18
• University of Roehampton
Sat, 17 Nov '18
• Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 17 Nov '18
Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE