HELP WITH UNITS

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Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

HELP WITH UNITS

Postby Savannah Mance 4G » Tue Nov 05, 2019 10:42 pm

For questions for chem in general, do you give the answer in the units that the question uses? I've been converting everything to the standard units (meters, liters, Kelvin, kilograms, seconds) regardless of what the equation gives. Am I supposed to keep the answer in the units that the question has? I really need to know before the midterm tomorrow so I don't get everything wrong!!!

Avnita C_4B
Posts: 50
Joined: Sat Sep 14, 2019 12:17 am

Re: HELP WITH UNITS

Postby Avnita C_4B » Tue Nov 05, 2019 10:44 pm

you should follow what the question wants as the final result, most of the time it will ask in standard units so you will be fine.

A Raab 1K
Posts: 56
Joined: Sat Aug 24, 2019 12:16 am

Re: HELP WITH UNITS

Postby A Raab 1K » Tue Nov 05, 2019 10:45 pm

It doesn't matter! It's probably better to convert to SI units so that when you plug numbers into equations, the equations work correctly, but for the final answer it doesn't matter if it's in (for example) km or m.

Tai Metzger 3K
Posts: 103
Joined: Sat Aug 24, 2019 12:17 am

Re: HELP WITH UNITS

Postby Tai Metzger 3K » Tue Nov 05, 2019 10:51 pm

For solving the problem you will most likely have to convert to SI units. For the final answer you can use whatever unit you want unless the question specified what unit to give in your answer.

Mai V 4L
Posts: 111
Joined: Fri Sep 28, 2018 12:23 am

Re: HELP WITH UNITS

Postby Mai V 4L » Sun Dec 08, 2019 9:05 am

Does anyone have a video they think is a good reference for this topic?

CMaduno_1L
Posts: 102
Joined: Wed Sep 18, 2019 12:18 am

Re: HELP WITH UNITS

Postby CMaduno_1L » Sun Dec 08, 2019 8:54 pm

Yeah! This video (https://youtu.be/7N0lRJLwpPI) helped me with this topic. Hope this is what you're looking for!

Gerald Bernal1I
Posts: 102
Joined: Thu Jul 11, 2019 12:16 am

Re: HELP WITH UNITS

Postby Gerald Bernal1I » Sun Dec 08, 2019 8:55 pm

It depends on the problem and what units the equation you are using uses. Sometimes it will give you a certain unit and the final question will ask you to convert it to a different unit.

t_rasul2I
Posts: 91
Joined: Wed Sep 30, 2020 9:38 pm

Re: HELP WITH UNITS

Postby t_rasul2I » Tue Oct 06, 2020 1:40 pm

often times, if you do the dimensional analysis correctly and what not, the units should cancel itself and you should be left with the right unit in the end

Yijia_Yang_3A
Posts: 49
Joined: Wed Sep 30, 2020 9:39 pm

Re: HELP WITH UNITS

Postby Yijia_Yang_3A » Wed Oct 07, 2020 6:29 am

Often time when you are done with a problem, the end result you get should be in standard units. But honestly I think any unit should be fine since they are refer back to the same amount (assuming you have the correct results).

Libby Dillon - 1A
Posts: 90
Joined: Fri Oct 02, 2020 12:17 am
Been upvoted: 1 time

Re: HELP WITH UNITS

Postby Libby Dillon - 1A » Wed Oct 07, 2020 11:24 am

Make sure when completing calculations you are using base SI units. These are units such as meters, seconds, and kilograms. This will ensure you are using the correct values in order to successfully cancel out other units. If you do calculations with centimeters, for example, you could end up with a completely different and incorrect result than if you first converted to meters. Prefixes like centi- and milli- are often used for convenience in answers and conversation but should not be used in calculation unless specifically noted in the problem.


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