Results 1 to 3 of 3
Like Tree1Likes
  • 1 Post By Sp3ctre

Thread: Chemistry Help - Calculations

  1. #1
    Cadet
    Join Date
    Mar 2017
    HSC
    2018
    Gender
    Male
    Location
    Gosford
    Posts
    40
    Rep Power
    1

    Chemistry Help - Calculations

    https://drive.google.com/open?id=0B_...0doZjlOQ0E0d0U

    How do I attempt question b?

    Any help would be greatly appreciated.

    Thanks.
    Preliminary 2017: //English Standard//Maths Extension 1//Physics//Chemistry//Design & Technology//IDTVET//

    HSC 2018: //English Standard//Maths Extension 1//Maths Extension 2//Physics//Chemistry//

    ATAR Aim: 95+

  2. #2
    Junior Member Sp3ctre's Avatar
    Join Date
    Nov 2016
    HSC
    2017
    Gender
    Male
    Location
    NSW
    Posts
    163
    Rep Power
    1

    Re: Chemistry Help - Calculations

    I can barely see the question but I think it's asking for the volume of oxygen.

    The first step for any type of these questions is to write out a balanced chemical eq'n: 2Mg + O2 --> 2MgO

    m(O2) = 32.95 - 32.63 = 0.32
    n(O2) = 0.32/16*2

    Then just use the eq'n: no. of moles = volume/molar volume
    i.e. volume = (0.32/16*2) * 24.79 = 0.2479 L (to the nearest litre)
    Robbie M likes this.
    HSC 2017: English Adv - Maths Ext 1 - Maths Ext 2 - Chemistry - Physics
    ATAR Aim: 97.30

  3. #3
    Cadet
    Join Date
    Mar 2017
    HSC
    2018
    Gender
    Male
    Location
    Gosford
    Posts
    40
    Rep Power
    1

    Re: Chemistry Help - Calculations

    Thanks
    Preliminary 2017: //English Standard//Maths Extension 1//Physics//Chemistry//Design & Technology//IDTVET//

    HSC 2018: //English Standard//Maths Extension 1//Maths Extension 2//Physics//Chemistry//

    ATAR Aim: 95+

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •