1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Finding the molar mass of air

  1. Jul 16, 2010 #1
    1. The problem statement, all variables and given/known data

    How many moles of MgIn2S4 can be made from one gram each of Mg, In, and S? Atomic masses are given.

    2. Relevant equations
    Moles = mass/molecular mass

    3. The attempt at a solution

    I have found the moles of each entity.

    Mg - 0.04167 moles
    In - 0.00871 moles
    S - 0.03125 moles

    Do I find the moles of the compound mentioned by adding the moles I have found here or do I say that the mass of the strange compound I have here is 3 g and that the moles formed are 3/(32 + 24 + 114.8 = molar mass of MgIn2S4)?

    How do I proceed?
  2. jcsd
  3. Jul 16, 2010 #2
    I'm sorry for the misleading title of the thread. It should be finding the number of moles!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook