Help with chemistry homework.! Pleaseee!?

Question

I have this 2 problems I'm not really sure about and want to double check. 

1. 
2Al(NO3)3 (aq) + 3H2CO3 (aq) --> Al2(CO3)3 (s) + 6HNO3 (aq) 

*What are the spectator ions? 

*If 3.0 moles of Al(NO3)3 reacts, how many moles Al2(CO3)3 will be produced?

2. 2Al (s) + 3O2 (g) --> 2Al2O3 (s) 

*What is the mole ratio between aluminum and oxygen?    I put 6:12 but I'm not sure if I was suppose to add them. What would the correct answer be of its wrong? 

And lastly *One mole of any gas at STP has a volume of 22.4L, this is called? 

I would really appreciate if someone helped me out here.! Thanks sooooo much!

PairOfOrangeShoes · Accepted Answer

1.1: The only spectator species is the nitrate ion, NO3^-1.  The hydrogen ion is not a spectator because carbonic acid is a weak acid and thus does not dissociate well.
1.2: 1.5 moles will be produced, since there is a 2:1 mole ratio.

2: The ratio is 2 Al : 3 O2. It's just the coefficients of those species in the balanced equation. 

"Lastly": STP is known as Standard Temperature and Pressure.

I hope this helps!

Anonymous · Answer

(1) A spectator ion is an ion that exists as a reactant and a product in a chemical equation.
    *We can write the equation as 
2Al^3+(aq) + 3NO3^-1(aq) + 6H+(aq) + 3CO3^2-(aq)----->2Al^3+(aq) + 3CO3^2- (aq) + 6H+(aq) + NO3^1-(aq)
 there fore Al^3+ ion and CO3^2- ions remain unchanged so theer are spectator ions.
* stoichiometric ratio between Al(NO3)3 : Al2(CO3)3=2:1
halfmoles of Al2(CO3)3 will be form
No.of moles of Al2(CO3)3= No.of moles of Al(NO3)3/2
=3mol/2
=1.5 mol

(2) mole ratio =2:3(Stoichiometric ratio)

*One mole of an ideal gas at STP occupies 22.4 liters.
STP=Standard Temperature & Pressurre

? · Answer

1. 1.5 mole of it is produced
2.its 2 :3
3.
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Help with chemistry homework.! Pleaseee!?

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