SI Units

Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

SI Units

Hi! I'm a little confused about the SI unit for mass. In the lecture, professor said that the SI unit for mass was kilograms. When we're writing our answers, do we convert our answers from grams to kilograms? Thank you!

Anushi Patel 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:19 am
Been upvoted: 1 time

Re: SI Units

I'm not 100% sure, but I think if the question asks for grams, we should keep our answer in grams. When we are doing calculations that require inputting the mass of something into a formula, that's when we convert from grams to kilograms.

skyeblee2F
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: SI Units

I agree with Anushi. Whatever the given mass is in the problem is the unit you should give in your answer.

Saleha_Mian_3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Re: SI Units

I agree, it depends on the problem if it asks for kg or g. I think when he meant to use kg for SI units he meant don't use pounds (lbs) because that is not an SI unit.

jocelyntzeng
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: SI Units

i agree, regardless of what the units you end up with, you should always end with the units that the question asks for

Karan Thaker 2L
Posts: 75
Joined: Fri Sep 28, 2018 12:26 am

Re: SI Units

I feel like for what we've done so far just always go with grams unless the question asks for kilograms. Chemistry involves measuring and calculating things in such small scale that using kilograms instead of grams seems unlikely. Of course, if the question specifies than go for kilogram but I think otherwise grams would be the way to go.

Kelly Zhang 1L
Posts: 31
Joined: Fri Sep 28, 2018 12:18 am

Re: SI Units

When we're doing problems, do we need to show units for our work to get credit?

Jordan Lo 2A
Posts: 85
Joined: Fri Sep 28, 2018 12:25 am

Re: SI Units

I believe that that it's better to air on the side of caution and always show units. On Lavelle's website, he included a link to an article about how important units are https://lavelle.chem.ucla.edu/wp-conten ... 4aflip.pdf
Also, I find it much easier to solve problems (for now) when I use units because they provide me a roadmap of which calculations I need to perform as I cancel out the units
kellyzhang1210 wrote:When we're doing problems, do we need to show units for our work to get credit?