Question

Please help I am confused with this question
How many grams of water can be produced when 11.7 moles of ethane (C2H6) react with excess oxygen gas?

Unbalanced equation: C2H6 + O2 → CO2 + H2O

Show, or explain, all of your work along with the final answer.

Answer 1

I already balanced it too

Answer 2

2C2H6 + 7O2 -> 4CO2 + 6H2O

Answer 3

ps please reply as asap

Answer 4

Use the stoichiometric coefficients to find moles produced.
Set up a ratio using the species of interest, like so:

e.g. for a general reaction:

\(\color{red}{a}A + \color{blue}{b}B\) \(\rightleftharpoons\) \( \color{green}{c}C\)

where upper case are the species (A,B,C), and lower case (a,b,c) are the coefficients ,

\(\dfrac{n_A}{\color{red}{a}}=\dfrac{n_B}{\color{blue}{b}}=\dfrac{n_C}{\color{green}{c}}\)

From here you can isolate what you need.
For example: if you have 2 moles of B, how many moles of C can you produce?

solve algebraically: \(\dfrac{2}{\color{blue}{b}}=\dfrac{n_C}{\color{green}{c}}\rightarrow n_C=\dfrac{2*\color{green}{c}}{\color{blue}{b}}\)
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To convert mass to moles, use the relationship:

\(n=\dfrac{m}{M}\)

where, M=molar mass, m=mass, and n= moles.

Answer 5

could you help set up the equation with me

Answer 6

@aaronq

Answer 7

i can't. you should be able to after reading what i posted.

Answer 8

well thanks lol

Answer 9

no problem