Matter and Measurement
Supplemental Instruction
Iowa State University / Leader: / Sara
Course: / Chem177
Instructor: / Kingston
Date: / September 2, 2014
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 homogeneous mixture
c. Ni pure substance element
d. O2 pure substance element
e. H2O2 pure substance compound
f. Brass homogeny mix
g. Aluminum pure sub element
h. Orange Juice hetero mix
i. 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
b. 0.05005 4
c. 0.300 3
d. 4050 3
e. 78000 2
f. 620.3
6) Compute the following calculations
a. 5.52 + 4.1 + 3.238
12.858 à12.9
b. 3.3 x 78.66
259.578 à 260
c. (4.5 x 3.768) + 10.934
16.956 + 10.934 = 27.890
28
d. 17.2-83.673+.0675
-66.4055 à -66.4
7) Convert 56 m/s into miles/hour (1.6 km = 1miles)?
56 m | 1 km | 1 mile | 3600 s | = 130 miles / hour
1s | 1000 m | 1.6 km | 1 hr |
8) Define the following as intensive or extensive?
a. Length extensive
b. Mass extensive
c. Density intensive
d. Color intensive
9) Iowa State wants to fit as many people in the great hall as possible for family weekend. Each person takes up 2.05 square feet of space. Great hall is 76.2 m2 and in America the average person weighs 196 lbs. In kg, how much will all the people on great hall weigh if the area is full of people. (1 meter = 3.28 ft, 1 lbs = 4453.6 g).