Identify the letter of the choice that best completes the statement or answers the question.
____ 1. Lavoisier worked with another chemist to develop a systematic maethod for
| | | |
b. | Naming chemical compound | | |
____ 2. How many electrons were lost or gained to form Fe3+ ion?
b. | 3 electrons lost |
____ 3. How many electrons werelost or gained to form O2- ion?
b. | 2electrons gained |
____ 4. How many electrons were lost or gained to form Cu+ ion?
c. | 1 electron Lost |
____ 5. An analytical chemist is most likely to
| d. | investigate the effect of leaded paint on the development of a young child. |
____ 6. The branch of chemistry that studies chemicals containing carbon is ____ chemistry.d. | organic |
____ 7. Chemists who work in the biotechnology field are most likely to work with
c. | Physicians |
____ 8. Which of the following does not answer the question: Why study chemistry?
c. | Measuring thermal losses and displacement of the objects |
____ 9. Which of the following is not a contribution from Lavoisier
b. | State the theory of conservation of mass. |____ 10. The variable that you change during an experiment is
b. | independent variable |
____ 11. The variable that is observed during an experiment is
a. | dependent variable |
____ 12. Which of the following is not a chemical change?
a. | paper being shredded |
____ 13. Which phrase best describes an apple?
a. | heterogeneous mixture |
____ 14. Which elementis paired with the wrong symbol?
b. | potassium, P |
____ 15. Which of these properties could not be used to distinguish between table salt and table sugar?
d. | Color |
____ 16. The state of matter characterized by a definite volume and an indefinite shape is a
a. | solid |
____ 17. Is what you observe when you look at a particular sample of matter. It is used to describematter.
d. | Properties |
____ 18. Property that depends on the amount of matter in a sample
a. | Extensive property |
____ 19. Property that depends on the type of matter in a sample, not in the amount of matter.
d. | Intensive property |
____ 20. Which of the following is not a Physical Property?
c. | Ability of rust |
____ 21. Ability of a substance to undergo aspecific chemical change.
b. | Chemical property |
____ 22. Which of the following is not a clue to identify a chemical change?
c. | Change in aggregation state |
____ 23. Which of these series of units is ordered from smallest to largest?
b. | mm, dm, m, km |
____ 24. Which answer represents the measurement 0.00428 g rounded to two significant figures?
c. | 4.28x10-3 g |____ 25. An over-the-counter medicine has 325 mg of its active ingredient per tablet. How many grams does this mass represent?
d. | 0.325 g |
____ 26. If a substance contracts when it freezes, its
b. | density will increase. |
Complete each sentence or statement.
27. Oxidation is ____________ electrons or ions
28. Reduction is ____________ electrons or ions29. _______________ is the general term for all the things that can be described as materials or “stuff”.
30. Chemistry is the study of the _____________ matter and the ___________ that matter undergoes.
31. __________ is the pursuit of chemical knowledge for its own sake.
32. ___________ is research that is direct toward a practical goal or application.
33._______ allows humans to do some things more quickly or with less effort. It allows people to do things that would be impossible.
34. One of the easiest ways to conserve energy is through the use of ___________. Which act as a _________ to heat flow from the inside to the outside.
35. ________ are devices that use chemicals to store energy that will be released as electric current....