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 2 years ago
If 116.34 grams of butane reacts completely with O2 in STP conditions, what is the mass (grams) of CO2(g) formed?
do i use PV = nRT here?
 2 years ago
If 116.34 grams of butane reacts completely with O2 in STP conditions, what is the mass (grams) of CO2(g) formed? do i use PV = nRT here?

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GOODMAN
 2 years ago
Best ResponseYou've already chosen the best response.0Sorry, im taking chem next year.

GOODMAN
 2 years ago
Best ResponseYou've already chosen the best response.0I thought you were smart! You should know this! lol jk.

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0no im not. im dyslexic

Kryten
 2 years ago
Best ResponseYou've already chosen the best response.2i just woke up so lets start slowly.... :) first lets write down the equation of the reaction: 2 C4H10 + 13 O2 > 8 CO2 + 10 H2O now lets start: n=m/M n(C4H10)= 116,34 g/58,124 gmol1 = 2 mol n(CO2)/n(C4H10)= 8/2 = 4 n(CO2)= 4* n(C4H10) = 4* 2 mol = 8 mol m(CO2)= n(CO2)*M(CO2)= 8 mol * 44,009 gmol1 = 352,072 g

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0okay...how did you get that equation o.O

Kryten
 2 years ago
Best ResponseYou've already chosen the best response.2well it states that butane reacts with O2 so it is combustion of butane and it states that butane COMPLETELY reacts with O2 so it is combustion with infinite amount of O2 so reaction is as i wrote it...

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0so im guessing c4H10 is butane

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0so what happened after? in the "let's start"

Kryten
 2 years ago
Best ResponseYou've already chosen the best response.2you must learn if you already dont know homologous series: http://en.wikipedia.org/wiki/Homologous_series

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0well anyway the equation wasnt that important since it was a given :S

Kryten
 2 years ago
Best ResponseYou've already chosen the best response.2it is not what happened after lets start but what happened before it! in chemistry key to solving any task is to read few times what the task says and understand what is your goal... if you can see from the task what is your goal and your start line only thing you need to do is to find simpliest equation to come to your goal...

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0well okay that reaction was given...so now what?

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0we never studied homologous thingies so i doubt it'll appear in our quiz

Kryten
 2 years ago
Best ResponseYou've already chosen the best response.2ok so you have reaction, now you need to see what are you asked to do... (homologous series is general culture question more than chemistry question...) your task states that you have certain amount of reactant at certain conditions and that you need to calculate amount of product so you always start to calculate moles since moles are equivalent and masses are not! so you first calculate amount of that reactant in moles! get me so far?

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0hmm maybe a demonstration will

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.0hmm sorry i just cant get this >.< maybe i'll come back to this once i have gained more experience...maybe then i can understand it...i'll try easier questions for now
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