Chemistry Midterm Part 2

  1. The chemical formula f a compound indicates ____.
    the relative proportions of the elements in the compound
  2. Which of the following changes to a metal is a chemical change?




    A. ) rusting
  3. Which of the following involves a chemical change? 




    A. ) decomposing
  4. The diameter of a carbon atom is 0 000 000 000 154 m. What is this number expressed in scientific notation?




    C. ) 1.54 * 10-10 m
  5. The expression of 5008 km in scientific notation is _____.




    A. ) 5.008 * 103 km
  6. What is the result of multiplying 2.5 * 1010 & 3.5 * 10-7?

    a.) 8.75 * 10-3
    b.) 8.75 * 1017
    c.) 8.75 * 103
    d.) 8.75 * 10-17
    c.) 8.75 * 103
  7. What is the result of adding 2.5 * 103 & 3.5 * 102?




    • C. ) 2.9 * 103
  8. The closeness of a measurement to its true value is a measure of its ___.
    accuracy
  9. Which of the following measurements contains 2 significant figures?




    C. ) 0.000 44 L
  10. Which of the following measurements is expressed to 3 significant figures?




    A. ) 7.30 10-7
  11. How many significant figures are in the measurement 0.003 4 kg?
    2
  12. How many significant figures are in the measurement 811.40 grams?
    5
  13. The chief advantage of the metric system over other systems of measurement is that it ____.
    is in multiples of 10
  14. What is the SI unit for mass?
    kilogram
  15. Who was the man who lived from 460 B.C - 370 B.C. and was among the first to suggest the idea of atoms?
    Democritus
  16. The smallest particle of an element that retains the properties of that element is a(n) _____.
    atom
  17. Evidence about Dalton's atomic theory has shown that
    atoms are divisible
Author
iPhenom
ID
206901
Card Set
Chemistry Midterm Part 2
Description
Chemistry midterm
Updated