Need some help with my decision (1 Viewer)

[Menomaths]

Join Jaycoo
Nah I kid

 

[AnimeX]

b) is 1.0x10^-3

oh sorry my bad i read an extra zero LOL

 

[RealiseNothing]

In chemistry, its significant figures, so u look at the question and the data given, and pick out the data that U HAVE USED (in this case the 5 grams of magnesium), how many significant figures is 5? Its 1 sig fig, so ur answer should be in 1 sig fig

so n = 0 (1sf) lol

this is a bad question i shouldve done 5.0001 grams

HOWEVER, say u did a question and u used 2 values from the information given: say 0.1001grams and 0.2grams, ur final answer will be in 1 sig fig as it is the lowest

n = 0 is not 1 sig fig though.

 

[jnney]

You don't need to do general maths. Don't do it if you know you're not going to perform well in the subject.

 

[jaycoo]

Join Jaycoo
Nah I kid

I have no idea what they are talking about. But shhh don't let them know ok.

 

[jaycoo]

You don't need to do general maths. Don't do it if you know you're not going to perform well in the subject.

Wait wait what do you mean I don't need it? I'm good at maths. Lets just say the teacher supervises the class rather than actually "teaching" stuff.

 

[jaycoo]

Can y'all explain how you got your answers please?

 

[HeroicPandas]

n = 0 is not 1 sig fig though.

thanks!

n = 0.21.. = 0.2moles (1sf)

 

[jaycoo]

thanks!

n = 0.21.. = 0.2moles (1sf)

Just a quick question... What are moles?

 

[ResourcesHSC]

I'd say as long as your comfortable with the chemistry calculations.

 

[Menomaths]

Just a quick question... What are moles?

Amount of any substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12
Dat state of confusion

 

[jaycoo]

Amount of any substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12
Dat state of confusion

I thought they were those spots on your skin that had hairs growing out of them HAHAHAHAHAHAHAHAHAAHAHAHAH no. ok. so every element has a mole/s

 

[jaycoo]

I'd say as long as your comfortable with the chemistry calculations.

If I do maths would it help me? Do I really need maths? Either way I'm still keeping it. Just wondering though.

 

[Menomaths]

I thought they were those spots on your skin that had hairs growing out of them HAHAHAHAHAHAHAHAHAAHAHAHAH no. ok. so every element has a mole/s

Your year 10 don't worry, if I tell you you might drop Chemistry

 

[jaycoo]

Your year 10 don't worry, if I tell you you might drop Chemistry

Is it really that bad? Just tell me. Ill try to cope.

 

[Menomaths]

A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro's Number, which is roughly 6.02x10^23. A mole of carbon atoms is 6.02x1023 carbon atoms.

 

[jaycoo50]

Example: Calculate the number of moles of 5 grams of magnesium (use the periodic table)

so, you would use, n= n/Mm,

find the Molar mass of magnesium from the periodic table, that should be easy. N = 5/Molar mass of magesium, I know it could get hard becasue you have'nt learnt all that yet, so relax "jaycoo" you still have about two years, while its good to learn ahead.

 

[jaycoo50]

If I do maths would it help me? Do I really need maths? Either way I'm still keeping it. Just wondering though.

yes. do maths 2u atleast if you want to do, chemistry, maths 2u and ext 1 will help you to perfrom the calculations and understand the concepts in chemistry.

I am plainging to do maths ext 1 and 2 in year 12, my brother scored 99.95 this year at james ruse. He said if you do maths ext 1 and maths 2u at school, then chemistry becomes much easy, and doing maths ext 1 and 2 in year 12, chemistry will be much easily and you can also get a band 6.

I am planning to do maths ext 1 and maths 2u in year 11.

 

[jaycoo]

yes. do maths 2u atleast if you want to do, chemistry, maths 2u and ext 1 will help you to perfrom the calculations and understand the concepts in chemistry.

I am plainging to do maths ext 1 and 2 in year 12, my brother scored 99.95 this year at james ruse. He said if you do maths ext 1 and maths 2u at school, then chemistry becomes much easy, and doing maths ext 1 and 2 in year 12, chemistry will be much easily and you can also get a band 6.

I am planning to do maths ext 1 and maths 2u in year 11.

Thanks for the advice but that would be too much for me. This year I'm the top 5.2 maths class. I was recommended general maths.

Who are you? I see we have the same name.

 

[jaycoo]

A mole is the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro's Number, which is roughly 6.02x10^23. A mole of carbon atoms is 6.02x1023 carbon atoms.

Ill keep that in mind so it's familiar with me. Thanks