Results 1 to 2 of 2

Math Help - chemistry problem

  1. #1
    Newbie
    Joined
    Apr 2008
    Posts
    7

    chemistry problem

    (22.4g - 8.3g)/(1.143mL - 0.002mL)

    =

    14.1g/ 1.140
    -----------^ that arrow is pointing to that zero cause that is where my first problem occured. do i add that 0? cause in the orignal denominator the 1.143 has 3 significant values after the decimal and .002 has 3 numbers after the decimal but only 1 significant. So do i leave it as 1.140 or 1.14 or 1.1??


    14.1g/1.140mL = 12.4g/ml cause 14.1 = 3sig figs... i think.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    o_O
    o_O is offline
    Primero Espada
    o_O's Avatar
    Joined
    Mar 2008
    From
    Canada
    Posts
    1,407
    You only take into account of significant figures after you do the calculation. Doing it midway will often throw your result way off from the theoretical.

    So: \frac{22.4 \text{g} - 8.3 \text{g}}{ 1.143 \text{mL} - 0.00{\color{red}2} \text{mL}}= \frac{14.1 \text{g}}{1.141 \text{mL}} = 12.3575... \text{g} / \text{mL} \ \rightarrow \ {\color{red}1}0 \text{g} / \text{mL}

    One significant figure is needed since 0.002 is the least accurate measurement.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. A chemistry problem - here?!
    Posted in the Statistics Forum
    Replies: 0
    Last Post: January 21st 2011, 10:52 AM
  2. plz help me in this chemistry problem
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: January 17th 2009, 01:44 AM
  3. Chemistry problem
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: October 3rd 2008, 03:26 PM
  4. Chemistry Problem help!
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: September 23rd 2008, 08:38 AM
  5. Replies: 10
    Last Post: April 28th 2007, 04:00 PM

Search Tags


/mathhelpforum @mathhelpforum