PLEASE CHEMISTRY please please please please please please help me with these two questions I have tried hundreds of different ways and it always is incorrect :( please help answer!!!!!

Question

anonymous · Answer

please!

anonymous · Answer

@thomaster please help me?? my comp is about to die im at the library i have to drive home and get the charger i will be back on though after and it will be within minutes of being due ahhhhhhhhhhhh brb help pleaseeee

thomaster · Answer

Sorry i'm not very good with the pressure stuff

aaronq · Answer

http://antoine.frostburg.edu/chem/senese/101/gases/faq/pressure-of-mixed-gases.shtml

aaronq · Answer

you're basically taking both of the partial pressures and taking both containers as one.

aaronq · Answer

for the second you need to write an equation and balance it, then using the stoichiometric coefficients, build a relationship in terms of moles.

like this general example:

aA + bB -> cC + dD 

lower case = coefficients
upper case = species

$$\frac{ n _{A} }{ a }=\frac{ n _{B} }{ b }=\frac{ n _{C} }{ c }=\frac{ n _{D} }{ d }$$

n means moles, in case you weren't aware.