2011-2012 Review HW For Mass, Sig Fig And Lab Safety Test

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Part I Answer the following questions in the space provided. Revised for 2020-2021 Students


1. Give an intensive physical property ________________________


2. Give an extensive physical property ________________________


3. Give an intensive chemical property ________________________


4. Why can you not have an extensive chemical property?

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5. Define compound: ____________________________________________


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6. What are the three difference between a compound and a mixture (just give the words, do not need to explain)?

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7. Explain why a compound and a homogeneous mixture are different. (can not use separation technique or characteristics of material).

__________________________________________________________________


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8. _______________ chemistry (or science) is done so that the knowledge can be used to create new materials or products (for example).


9. ___________________ is an educated guess (as part of the scientific method)(2020-2021 Student do not do).


10. _________________ experiments are the only one used in the scientific method.(2020-2021 Student do not do)


11. Explain the two difference between a theory and a law.(2020-2021 Student do not do)

______________________________________________________________________


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12. Give me two observations of a chemical reaction. ______________________ and ____________________________


13. _____________________ is a solid formed in a liquid (or solution).


14. What are the 4 basic principles that Mr. McLeod believes can explain any chemical concept (except nuclear chemistry).


_________________________, _____________________________,

_________________________, and _________________________


15. Define Kinetic Molecular Theory (KMT): ___________________________________________________________


_________________________________________________________________________
_______________________________


16. _____________ is the symbol for base unit of mass.


17. Give me a piece of lab safety equipment, explain its function and explain where it is in the room.(2020-2021 Student do not do)



18. Name of the base unit for temperature. __________________


19. Symbol for the base unit of amount of substance. ______________


20. Name for base unit (or particle) of an ionic compound. _______________

21. Liquids and Solids are consisted to be in the ____________ phase and do not have enough energy to overcome their ______________________?

22. Why do gases take the shape of any container? Answer using KMT (i.e. what is going on with the Particles).



Part II Answer the following problems showing all work.


1. How many sig fig in the number 32.010g ____________


2. Give me a number with 3 sig fig where one sig fig is from a "sandwich zero" ____________


3. How many sig fig in the number $120 ________


4. ______________ is defined as the reproducibility of results.


5. To determine the number of sig fig in the answer, what is the first question you ask yourself?

______________________________________________________________________________

For the following calculations, to show work you need to be giving me two numbers (fill in the two blanks) as part of your answer (as we discussed in class). Remember, every number needs units after them and numbers greater than 1000 and less than 0.001 must be in scientific notation (SN) anywhere in your work.

6) 4.3s + 12.34s + 0.545s = ___________________ = ______________________


7) 200L - 0.53L = _______________ = _________________


8. (40.2 cm ) (5.040 cm ) = _________________ = _________________


9. (9.05 m ) (10. m) (3.40 m ) = __________________ = _________________


10. ( 3.00 E-4 cm ) / (8.01 E-6 s ) = __________________ = _________________


11. ( 312.05 L ) / (67.0 min ) = __________________ = ________________


12. ( 5.03 E8 cm ) ( 9.020 cm ) ( 6.00 E-2 cm ) = _________________ = ________________


Convert from actual number to Scientific Notation for the following:

13. 0.000034050 cm = ____________________

14. 30950000 ft = _________________

15. Write 300g with 2 significant figures (sig fig): ________________

16. Now with 1 sig fig _____________ and with 3 sig fig ____________



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