Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: tanishalala on January 21, 2022, 05:02:07 PM

Question attached as image. Thanks in advance. Sorry for the bad translation. I can’t solve B

Looks like a trivial stoichiometry, what have you tried and why it didn't work?

Looks like a trivial stoichiometry, what have you tried and why it didn't work?
So I tried:
Calculating the Volume so I could use M1V1=M2V2
But I don’t know how to calculate the volume. Also converted PH3 to moles (0,0294) but not sure what to do with it next. The moles I converted is with the molair mass of PH3 divided by the one gram. Tried dividing it with 4 since the ratio PO3 with PH3 is 4. So I’m not really sure if I’m close to anything but I really really can’t figure it out..
I tried so many more things but erased them out of frustration sorry.

Calculating the Volume so I could use M1V1=M2V2
There is no dilution here, I am afraid this formula won't help.
converted PH3 to moles (0,0294)
Good starting point.
Look at the reaction equation: how many moles of the starting material is required to produce that number of moles of PH_{3}?
Do you know any formula that combines number of moles, volume and concentration of the substance?

Also, compare https://www.reddit.com/r/chemhelp/comments/s9me89/cant_solve_b_thanks_in_advance_been_on_this_for/