Question

Question about polyatomic ions..

Answer 1

Ammonia for example, in my book which is

NH4-

Can also be expressed as NH3?

Your allowed to change it around as long as the charge is neutral?

Answer 2

@dan815 @Jhannybean

Answer 3

Oh I'm not really sure about that.

All I know is that ammonium is written as \(\sf NH_4^+\)

Answer 4

And Ammonia is \(\sf NH_3^+\)

Answer 5

there's a difference?

Answer 6

Mmhmm.

Answer 7

I have a problem where the book states to balance ammonia(g)+oxygen(g)>>nitrogen monoxide(g)+water (l)

Answer 8

so i gotta put it in chemical formula first

Answer 9

\[\sf NH_4 ~(g) +O_2 ~(g) \longrightarrow NO~(g) + H_2O ~(l)\]

Answer 10

aww i see it now i wrote ammonium into the place of AMMONIA which is why i got it wrong..

Answer 11

Mmhmm, and all you have to do is finish balancing it :)

Answer 12

ammonia isn't even in my book. is there a pattern to this? like it if ends with "ia" and "ium"

Answer 13

No,ammonia and ammonium are just special cases.

Answer 14

you'd want to know your diatomics, Hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, iodine

Answer 15

Oh, so if it was just nitrogen, it would be N2, but since it's nitrogen monoxide, you leave out the 2?

Answer 16

And um... your polyatomic compounds and monatomic compounds

Answer 17

Yeah, Nitrogen MONOoxide, but written as Nitrogen MONoxide

Answer 18

Mono means 1, and because it's a covalent compound, meaning its a nonmetal + nonmental, it's written as NO

Answer 19

and said Nitrogren MONoxide.

Answer 20

polyatomic compounds and monatomic..

is polyatomic just any compound with over 2 per element..?

Answer 21

Hmm..polyatomics are all your cations and anions

Answer 22

if i remember ionic compounds

you name the cation normally then end anions u end with 'ide"

Answer 23

covalent would be based on the amount per element?

Answer 24

mono, di, tri, tetra etc

Answer 25

dam this chemistry takes a while to remember..

Answer 26

Yeah. It does, haha

And for polyatomics its mostly dependant on the compound itself..... i'd justlook up apolyatomic sheet on google and look at how the compounds are formed and relate it to the endings

Answer 27

I'll give you something that's confusing me..

Hydrogen Sulfate vs Nitrogen Monoxide

one keeps the h2 but the other leaves as N?

Answer 28

I've got to head off, so have a good night :) and good luck!

Answer 29

oh alright, np. thank you.

Answer 30

Ohhm...

Answer 31

Hydrogen Sulfate -Sulfur has a -2 charge, hydrogen has a +1 charge, \(\sf H^+ ~,~ SO_4^{2-}\) written as \(\sf H_2SO_4\) this is an ionic compound, notice how the hydrogen is a cation and sulfate is the anion.

Nitrogen Monoxide -covalent compound made up of two nonmetals. These compounds are written exactly how they are said. \(\sf NO\)

Answer 32

Sorry, i meant to write sulfate, not sulfur.

Answer 33

Oh..so basically you NEED 2 hydrogens to make it neutral in the first place

Answer 34

In the process of writing compounds, you have to memorize or understand what the cation and anions are.

Answer 35

so you can get rid of the -2