SDS Activity and Metric Conversions

  1. Choose one of the following Safety Data Sheets (SDS) and answer the following questions. In each case, also indicate the SDS section number that contained the relevant information.

SDS links:-

  1. Sodium Bicarbonate:  http://www.labchem.com/tools/msds/msds/LC22943.pdf
  2. Ammonium Nitrate https://www.fishersci.com/msds?productName=A676212
  3. Sucrose https://www.fishersci.com/shop/msdsproxy?productName=S650&productDescription=SUCROSE
  4. Methanol https://www.labchem.com/tools/msds/msds/VT430.pdf
 Section #
What is the chemical name AND chemical formula of the compound?     State how many atoms are in one unit of this compound _________   
Describe the appearance of the compound. What is the natural state of this material?   
State three physical properties.     
State three chemical properties. (NOT THE SAME as physical properties)     
What should you wear when handling this material?     
Do you think that this compound poses a health hazard? Why or why not?   
Do you think that this compound poses an environmental hazard? Why or why not? 



Dimensional Analysis

Single unit conversion

or

Double unit conversion

            or

How to read: 1 prefix unit = ____ base units

Example: 5 Gbyte = 5×109 bytes

PrefixSymbol# base units
tera-T1012
giga-G109
mega-M106
kilo-k103
hecto-h102
deka-da10
deci-d10-1
centi-c10-2
milli-m10-3
micro-µ (mu)10-6
nano-n10-9
pico-p10-12
femto-f10-15
  • Complete each of the following conversions and maintain the same number of s.f.
  1. 0.0007836 g à µg
  • 25.82 g à kg
  • 37.1 × 10-6 cm à nm

Hint: cm à m à nm

  • 1000 ml à dm3 (4 sf)
  • 342 mm2 à nm2

Hint:    10 mm = 1cm

(10 mm)2 = (1cm)2

                        100 mm2 = 1cm2

  1. Convert34 mph to km/h. Hint: does mph contain 1 or 2 measurement units?
  • Convert32.0 dm s-1 to km h-1
  • Calculate the mass of 16.0 fluid ounces of milk. Density of milk = 1.03 g/ml, 1 fl. oz. = 29.6 ml.
  • Convert 9.85 dm3 to ml.

Evaluation of Significant Figures

  • Indicate the number of significant figures in each number (some may have more than one answer):

a.  307.60 g           ____________                        b.  250 mL       ______________

      c.  0.00256 m        ____________                        d.  10.00 mL   ______________

  • Round each of the numbers to the indicated number of significant figures AND write the number in scientific notation:

            a.  36000 (3)    _______________                  b.  0.00752689 (4)       ______________

            c.  319 (2)        _______________                  d.  0.19850 (3)            ______________

  • Make each of the calculations and round the answers to the correct number of significant figures (s.f.):
  1. 3.58g/1.739 ml
  • 4.03 ml + 0.001 ml
  • (1.345 g + 0.022 g)/(13.36 ml – 8.4115 ml)
  • (210 ×10-4)2 (78.201 × 10-5)-3

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