Chapters 1,2,3 Chemistry Test
Name: __________________________________________
1. Which of the following are base units and which are derived units?
liters
Newton’s
kilograms
meter/second
Base Units:
_______________________________________________________
Derived Units:
_______________________________________________________
meters squared
2. What SI base unit measures each of the following?
a. length
____________________
b. time
__________________________
c. mass
____________________
d. temperature
__________________________
3. How many significant figures does each number have?
a. 0.00982
______
b. 30400 _______
c. 0.06090
_______
d. 60700.00
_____
4. Carry out the following operations and express your answer with the appropriate significant figures:
a. 745.7 x 0.3 =
_____________________
b. 1.04 -- 0.82 =
________________
c. 7.0342 + 9.5 + 0.00543 =
_____________________
d. 11.023 + 42.677 =
________________
e. 6 beakers x 52.118 g/beaker =
___________________
f. 38.59 - 6.2705 =
________________
5. What are the two main causes of uncertainty that exists in all measurements?
_________________________________________________________________________________________
6. Round 34,297,407 to 4 significant digits: ___________________________________
7. Three scientists measure the standard meter bar ( this is the basis for how long 1 meter is ) kept at the International Bureau of Standards. Their
measurements are 1.09m, 1.08m, and 1.08m. Are their measurements accurate, precise, neither or both? Explain your answer.
_________________________________________________________________________________________
_________________________________________________________________________________________
8. Express the following numbers in scientific notation:
a. 9000000
______________ b. 0.00583
________________
d. 0.00045
______________ e. 4000
________________
c.
59,000
f. 0.0081
________________
________________
9. Take the following numbers out of scientific notation:
a. 3.2 x 10
-4
____________
b. 5.78 x 10
5
_______________
c. 6.7 x 10
-8
________________
10. The volume of a rectangular solid is known to be 556 cubic centimeters. A student takes the following measurements for the dimensions of the
rectangular solid: 8.34 cm x 6.19 cm x 10.42 cm
a. What volume (correct sig figs) is calculated for the rectangular solid?
_______________________
b. What is the percent error (correct sig figs) of these results?
_______________________
percent error = (observed value - true value)/ true value x 100
11. Make the following conversions using this chart:
kilo hecto
deka _____
deci
centi
milli
a. 340 m = ____________________ km = ___________________cm
b. 5.6 kg = ____________________ g =
___________________ mg
c. 0.0087 cm = __________________ mm = ___________________ m
d. 0.00392 kL = _________________ cL = ___________________ mL
12. Fill in the blanks:
a. A balance is used to measure the _____________________ of an object.
b. According to the Phlogiston Theory, objects that are ____________________ give off phlogiston.
c. An educated guess to a problem is called a __________________________.
d. Units made up of a combination of base units are called ________________________________.
e. When making a measurement, there can be only _________________ uncertain digit.
f. In an experiment, you must always leave one part unchanged. This is called the ________________.
g. Theories are never proven. Sometimes, new information comes out that proves that a theory is not correct. Then, the old theory is
________________________.
h. The set of steps used to solve problems in science is known as the _______________________________.
13. True / False:
a. _____ The cubic meter is an example of an SI base unit.
b. _____ Measurements that you might make in the chemistry laboratory are never uncertain.
c. _____ An appropriate metric unit to measure the distance between New York and Boston would be the centimeter.
d. _____ Percent error can be positive or negative.
e. _____ If I throw 3 darts at the bullseye of a dartboard and miss it but all three darts are clustered on the number 17, then I am accurate.
f. _____ Leading zeros are never significant.
g, _____ Volume is the amount of matter in something.
h. _____ The SI system of measurement is the only system of measurement.
i. _____ When adding and subtracting numbers, your answer can only be reported to as many decimal places as the number with the least
amount of decimal places.
j. _____ Captured zeros are never significant.