Worksheet 1a:
Matter and Measurement
Supplemental Instruction
Iowa State University
Leader:
Course:
Instructor:
Date:
Sara
Chem177
Bonaccorsi
1/19/14
1) Matter is…
a. Stuff you can hold in your hand
b. Something that has mass and occupies space
c. Something that has weight
d. Everything
2) Classify the following as heterogeneous, a homogeneous solution, or a pure
substance (if it is a pure substance is it an element or a compound)?
a. Ocean water heterogeneous mix
b. Water bottle water pure sub
comp
c. Ni pure substance element
d. O2 pure substance element
e.
f.
g.
h.
i.
H2O2 pure substance compound
Brass homogeny mix
Aluminum pure sub element
Orange Juice hetero mix
Apple juice homo mix
3) What is the difference between a chemical and a physical change?
A chemical change you change the atomic make up of the substance
An easy way to tell generally is if you can go back to the original state it is
physical
4) If 5 ml of maple syrup has a mass of 6.6 g, and you mix it with water and alcohol
(d=.79 g/mL) and then left to settle, how will they separate (label beaker)?
Alcohol d = .79 g/mL
Water d = 1 g/mL
Syrup d = 1.32 g/mL
5) How many significant figures are in each of the following numbers?
a. 0.0046 2
d. 4050 3
b. 0.05005 4
e. 78000 2
c. 0.300 3
f. 620.3
6) Compute the following calculations
a. 5.52 + 4.1 + 3.238
c. (4.5 x 3.768) + 10.934
12.858 -----12.9
16.956 + 10.934 = 27.890
28
b. 3.3 x 78.66
d. 17.2-83.673+.0675
259.578 ---- 260
-66.4055 --- -66.4
7) Convert 56 m/s into miles/hour (1.6 km = 1miles)?
56 m | 1 km
|
1 mile | 3600 s
| =
1s
| 1000 m
| 1.6 km
| 1 hr
|
126 miles / hour
8) Define the following as intensive or extensive?
a. Length
extensive
b. Mass
extensive
c. Density
intensive
d. Color
intensive
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