Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
100
How many significant figures are in the number 0.0005690
4
100
What is the temperature in Kelvin of 34 degrees Celsius?
307 K
100
Is baking a cake an example of a physical change, or a chemical change?
Chemical change
100
Which of these is a pure substance?
D
100
Brown has a mass of 1.5 g, Red has a mass of 3 g, and Blue has a mass of 6 g. What is the relative mass of each item compared to the brown.
Brown: 1 Brown
Red: 2 Browns
Blue: 4 Browns
200
How many kilometers are there in 5,520,000 mm? Use the factor label method
5.52 km
200
What is the relationship between temperature and volume of a gas?
If volume increases the temperature increases. If volume decreases, the temperature decreases.
200
If temperature of an object decreases, what happens to its thermal energy?
The thermal energy decreases
200
Which of these contains a liquid?
B
200
What is Avagadro's Number?
6.022 x 10^23
300
What would happen to the density of an object if the mass increased but the volume did not change?
p=M/V
M=pV
V=M/p
The density would increase.
300
What is the relationship between volume and pressure of a gas?
If the volume increases, the pressure decreases. If the volume decreases, the pressure increases.
300
What is happening at Part B of this graph?
A phase change
300
What is the difference between homogeneous mixture and heterogeneous mixture?
Homogeneous: Uniform composition throughout.
Heterogeneous: Components are not uniformly distributed.
300
What is the percent by mass of O in water, H2O?
88.89%
400
Gasoline has a density of 0.75 g/mL and Water has a density of 1.0 g/mL. What would happen if we mixed the two? Why?
The gasoline will float on top of the water because it is less dense.
400
A weather balloon is filled with helium gas at a temperature of 250 K and a pressure of 1.5 atm. As the balloon rises into the atmosphere, it experiences lower temperatures. Describe how the pressure inside the balloon will change as the temperature decreases.
As the temperature decreases, the pressure also decreases.
400
What is happening at part C of this graph?
Temperature Change
400
There is a compound of Nitrogen and Oxygen that contains 60 g of Nitrogen (N) and 35 g of Oxygen (O). What is the mass ratio of N to O.
1.71
400
How many grams are in 2 mols of H2O?
36 g
500
The density of substance A is 6.8 g/mL. At a volume of 4 mL, what is the mass of substance A? M=pV
27.2 g
500
A container of gas has a volume of 100 cm3 at a temperature of 10 degrees C. If the pressure remains constant, what is the volume at 30 degrees C? Make sure to convert Celcius to Kelvin. V2=V1*T2/T1
107 cm3
500
A cup of hot green tea sits on the counter at room temperature. Complete an LOL diagram.
500
There is a compound of Nitrogen and Oxygen. It contains 45 g of Nitrogen (N) and 50 g of Oxygen (O). what is the mass ratio of N to O?
0.90
500
How many moles are in 8.00 grams of NaOH?
0.2 mol