Chemistry Algebra Pre-Test
Stuff you should probably
know already:
1. Write 3/5 as a decimal number. _____________
2. What is the reciprocal of 3/5? (leave answer
as a fraction) ______________
3. Write 0.000045 in scientific notation __________________
4. Write 4500 in scientific notation _______________
5. Write 3.45 x 105 in decimal
form ________________
6. Write 3.45 x 10-5 in decimal
form ________________
Stuff you may or may not
know already:
7. For
Your Information: The equation for
density is: D = m/v where D =
density, m = mass and v = volume.
Question: Re-arrange this equation so that v is on one
side of the equation, and D and m are on the other side. NO NUMBERS! ONLY RE-ARRANGE THE LETTERS OF THE FORMULA
v = ________________
Fun with Conversions! (Leave your answer in standard scientific
notation)
For Your information: 10-3 Km = 1m and
102 cm = 1m
8. 1609 m is how many Km? _____________
9. How many cm are in 500 Km? ________________
10. Convert 30 cm2 to m2 ______________
11. Convert 80 cm2 to Km2 _____________
Fun with Fractions:
12. Solve this problem and leave your answer as
a fraction (five sixths divided by four fifths)
5/6
4/5
Interpreting Values and
re-arranging formulas:
13. Consider the following mathematical
equation: D = m/v. D = density, m = mass,
v = volume
and
answer letters a-d with either: (Increases, Decreases or Stays the Same). HINT:
Sometimes it helps to substitute numbers in for the letters so you can
see if it is increasing/decreasing/stays same.
a.
If v increases and m stays the same, what would happen to D? _________
b.
If D increases and m stays the same, what would happen to v? ________
c.
If m decreases and D stays the same, what would happen to v? ________
d.
If m decreases and v stays the same, what would happen to D? ________
Multiplying and dividing
Scientific Notation:
14. 6.00 x 105 =
____________________
2.00 x 103
15. (3.00 x 105) x (2.00 x 10-4)
= _________________
Significant Digits: How many significant digits are in the
following numbers:
22. 0.000034
___________ 25. 5000001 _______________
23. 0.003040
___________ 26. 5000.
_______________
24.
50000______________ 27. 100.001 _____________
If you don’t know how to do significant digits, you might check
under the notes section of the Chemistry website. There is a hyperlink there which will help you.