Name one practical application of knowing a substance's density
figuring out if a substance is pure, figuring out if it will float/sink in water, etc etc
100
How many meters in a kilometer?
One thousand
100
Is ORANGE JUICE an ELEMENT, a PURE SUBSTANCE, a COMPOUND, or a MIXTURE?
MIXTURE
100
Which data set is more accurate/precise for a density value of 8.9 g/cm3 ?
A) 8.1g/cm3, 7.0 g/cm3, 4.5 g/cm3, 9.5 g/cm3
B) 5.4 g/cm3, 6.1 g/cm3, 4.9 g/cm3, 5.3 g/cm3
A) more accurate
B) more precise
100
How would you put the following number into scientific notation?
3010101
3.010101 x 10^6
200
Density Equals ....
Mass over Volume
200
Convert 40 meters to kilometers
0.04 km
200
Is PURE WATER an ELEMENT, a MIXTURE, a LIQUID, or a COMPOUND?
COMPOUND
200
How many significant figures are in the number
0.000010903
FIVE
200
5.2094 x 10^6 <---- put that number into expanded notation
5,209,400
300
Mass Equals
Density times volume
300
Convert 500 L to mL
500,000 mL
300
Is ORANGE JUICE a HOMOGENOUS MIXTURE or a HETEROGENOUS MIXTURE?
HETEROGENOUS MIXTURE
300
Multiply 4.0 times 6.482 and report out the correct number of sig figs
26
300
6.02 x 10^23 / 6.02 x 10^-22 =
1 x 10^45
400
Some typical units of density are:
g/mL or g/cm3 or g/cc or g/L
400
Convert 650 uL to L
0.00065 L
400
Stainless steel is an iron alloy with a high chromium content to prevent rusting. This is an example of
a) a PURE SUBSTANCE
b) a HOMOGENOUS MIXTURE
c) an ELEMENT
d) a COMPOUND
e) a HETEROGENOUS MIXTURE
b) HOMOGENOUS MIXTURE
400
Add 1.08 plus 600.1 and report out with the correct number of sig figs
601.2
400
Using 3 significant figures, convert the following into scientific notation
5409094018209
5.41 x 10^12
500
If an object has a mass of 140 grams and a volume of 70 mL, what is its density?
2 g/mL
500
Convert 33 cm3 to liters
0.033 L
500
Highly compressed carbon dioxide forms what we call "dry ice," which sublimates from a solid direct to the gaseous state. This is an example of
a) a compound
b) a physical change
c) a homogenous mixture
d) a chemical change
b) physical change
500
Do the following operation and give the answer using correct sig figs:
(1.3000 x 10^8 / 2.0001000 x 10^5)
6.4997 x 10^2
500
What is the point of using scientific notation AND significant figures?
It is the degree to which you can confidently report out data from the system of measurement you are using in a compact form.