Explore BrainMass

Explore BrainMass

    Significant Figures

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    A) Provide the type of measurement (volume, length, temperature etc.) for the following units:

    i) 298 K
    ii) 65 mL
    iii) 15 m
    iv) 290 kg
    v) 50 g

    b) Write the following measurements in scientific notation:
    i) 150000000 kg
    ii) 0.28 L
    iii) 0.00004 m

    c) Answer whether the numbers in each of the following statements is measured or exact:
    i) The Cambrian explosion occurred 545000000 years ago.
    ii) 26 students went for the field trip.
    iii) The number of microbes on a telephone is 25600.

    d) State how many significant figures there are in each of the following measured quantities:
    i) 18.000 m
    ii) 52.80 L
    iii) 7.0 X 10-14 kg

    e) Round off each of the following numbers to two significant figures:
    i) 66.666
    ii) 0.0063424
    iii) 9577

    © BrainMass Inc. brainmass.com June 3, 2020, 8:48 am ad1c9bdddf
    https://brainmass.com/chemistry/general-chemistry/significant-figures-111306

    Solution Preview

    Please see attached file.

    Solution is below, and as HTML attached - provided a couple of links that are live in the HTML page version.

    As for "help", I am going to point you to the resources you need to answer these yourself, and put in an example or two - but NOT to do them for you, OK? So let's go then!
    -------------------------------------------------------------------------------------------------------------------

    a) Provide the type of measurement (volume, length, temperature etc.) for the following units:

    i) 298 K
    ii) 65 mL
    iii) 15 m
    iv) 290 kg
    v) 50 g

    go to the following site and look at the entries for metric and SI units, should be easy enough
    http://www.ex.ac.uk/cimt/dictunit/dictunit.htm#SI

    b) Write the following measurements in scientific notation:

    i) ...

    Solution Summary

    Answer goes down a sort list of problems and deals with issues such as significant figures, rounding, and math as related to science in general.

    $2.19

    ADVERTISEMENT