# Recent content by sugarandspice

1. ### Chemistry in the Real World - Super Quick Question on chemistry/pools

I have to write a little report on an industry that uses a chemical reaction(s) and basically answer these questions (skip down to the bottom if you just want to see my quick question): ~~~~~~~~~~ 1. Identify chemical reactions upon which the industry relies. 2.Write the chemical equation...

Thanks everyone (Samba especially)! I 'completed' the assignment last week - Looks like I got one right. I just guessed though because I couldn't figure out how to find the amount of moles to use in the PV=nRT equation. I'm still pretty fuzzy about that but thankyou so much Samba your step by...

Here is the example I was given: ------------------------------ Example: How many liters of hydrogen gas can be produced at 290 K and 2.5 atm if 40.0 g of sodium react with excess water according to the following equations: 2 Na(s) + 2 H2O(l) --> 2 NaOH(l) + H2(g)...
4. ### Chemistry Multiply by the number of moles of that substance

Looking over my notes, it looks like you hit it right on! I'm still a *little* fuzzy but I can't thank you enough for helping me out. I was gonna have to submit this with no idea what I was doing.. :) Any help at all is better than no help. Thankyou SO much for your help.
5. ### Chemistry Multiply by the number of moles of that substance

This is the question: Balance the equation and Calculate the enthalpy change for the following reaction: NH3(g) + O2(g) --> N2(g) + H2O(l) NH3(g)= -46.11 kj/mol O2(g) = 0 kJ/mol N2(g) = 0 kJ/mol H20(l)= - 285.830 kJ/mol I know that to begin, I need to multiply the numbers above by the...
6. ### Chemistry Multiply by the number of moles of that substance

How do I figure out how many moles to mutiply by? It says "multiply by the number of moles of that substance" How do I figure that out? Here's where I am: H2O(l)= - 285.830 kJ/mol x ___ mol NH3(g)= -46.11 kj/mol x ___ mol --- And what does the L or G mean for the...
7. ### Enthalpy of Reactions - can someone help me real quick?

Ok! So here's the correct balanced equation: 4NH3 + 3O2 ----> 2N2 + 6H2O Keeping in mind the problem: Now, I already know this (I didn't figure this out, it was provided to me): NH3(g)= -46.11 kj/mol O2(g) = 0 kJ/mol N2 = 0 kJ/mol H20= - 285.830 kJ/mol So now I need to...
8. ### Enthalpy of Reactions - can someone help me real quick?

Whoops! This is an example question!! Sorry sorry - here's the real problem! This is what I'm trying to figure out how many mols to times by. :o :D Balance the equation (Already did this) and Calculate the enthalpy change for the following reaction: NH3(g) + O2(g) --> N2(g) + H2O(l) NH3(g)=...
9. ### Enthalpy of Reactions - can someone help me real quick?

I hate stoichiometry. Here's the problem: How do I figure out how many mols to multiply for each product and reactant? I've already been given the other part of the equation. Thanks
10. ### Limiting Reactant Problems Stoichiometry

Please help me a little bit more! Thanks so much!!
11. ### Limiting Reactant Problems Stoichiometry

So, S + O2 = SO2 32.066 + 31.9988 = 64.0648 1 mole + 1 mole = 2 moles? Is that it? Wouldn't it only form one mole of SO2? Thanks for replying!
12. ### Limiting Reactant Problems Stoichiometry

Please help me I am so lost!! Here's the lesson. My writing is in Blue. Where should I start? I am that confused; I feel like :cry: Thanks for your help!!