Unit 6 review- properties of matter
100 mL of substance B because it is denser than A
Based on the Mass vs Volume graph of 2 substances, which would occupy a larger space 200g of substance A or 200g of substance B?
Amount of mass within a given volume.
Density
g/cm3 or g/mL
Density is measured in what units?
1 g/mL (or 1 g/cm³)
Density of water
The object will sink, it has a greater density.
Solve The Problem If an object has a mass of 50 g and a volume of 20 ml will it sink, float or suspend in a liquid with a density of 2 g/ml?
float < 6 g (less than 6) sink > 6 g (more than 6) suspend = 6 g (equal to 6)
Solve The Problem If you had an object with a volume of 6 cm3 what would the mass have to be for the object to float, sink and suspend in water?
Second(1.45g/mL) - Third(.97g/mL) - First(.55 g/mL). Otherwise the liquids would mix because they wold float through the others.
Solve the Density Column Problem You are given three liquids. One has a density of 0.55 g/ml. The second has a density of 1.45 g/ml. The third has a density of 0.97 g/ml. Which order would you put them into a test tube to layer them?
The object will float, it is less dense than water (1g/mL). The volume is greater than the mass.
Solve the Problem You are given an object that is 15 g and has a volume of 25 cm3. Will the object sink, float or suspend in water?
Based on the Mass vs Volume graph of 2 substances, which is denser?
Substance B because it has a greater slope
false- ice is less dense so it takes up more space... greater volume
T or F: 20 grams of liquid water takes up more space than 20 grams of ice
false. The number of water molecules does not decrease, but the space the water molecules occupy (volume) decreases.
T or F: After an ice cube melts, the number of water molecules present as liquid water is less than the number present when they made up the ice cube.
false - Ice floats in water; therefore, it is less dense than water.
T or F: Ice is more dense than water.
density
The amount of mass in a certain amount of volume is the definition for what?
volume
The measurement of how space an object occupies
density
The slope of a mass vs volume graph give you
mass
What is the amount of matter in an object?
volume
What is the amount of space matter takes up?
1 g/ml
What is the density of fresh water?
D = M / V
What is the formula to measure density?
90g
What is the mass of a substance with the density of 3 g/cm3 and a volume of 30 cm3? Use the equation.
2 cm3
What is the volume of an object with a density of 50 g/cm3 and a mass of 100 g?
liters of some sort - mL
What units do you use to measure liquid volume?
The density of ice is less than the density of water because while a mass of water remains constant during the cooling and freezing process, the volume increases when ice forms.
How does the density of liquid water compare with the density of ice (frozen water)? Why?
density
How tightly packed something is would be its what?
Water because it is less dense.
If I pour a liquid with a density of 2.4 g/cm3 in a container with water, which will be on top?
The object will sink, it has a larger density.
If an object has a density of 2 g/cm3 and a liquid has a density of 1 g/ml, will the object sink, float or suspend in the liquid?
The object will be suspended, it has the same density.
If an object has a density of 2 g/cm3 and the liquid has the density of 2 g/ml will the object sink, float or suspend in the liquid?
Object floats in water
If density of an object is less dense than water...
density
If you compare mass to volume what are you finding?
Same The density would be the same for both volumes of liquid. Regardless of sample size DENSITY is always the same. (Characteristic Property)
If you have 20 ml of chocolate milk and 50 ml of chocolate milk, would the density be the same or different?
Amount of matter in an object
Mass
make an equation for the line
m= 1.2 (g/mL) * V
More dense means more crowded so: add more mass (stuff) give it less space (volume)
Two ways to make something more dense is to....
What component of a mass vs volume graphs gives you density?
slope
milliliters (mL)
unit for measuring volume of a liquid
cubic centimeters (cm3)
unit for measuring volume of a solid
The density is 8 g/cm3
A sample of a solid substance has a volume of 50 cubic centimeters (cc) with a mass of 400 grams. What is the density?
mass
A scale or triple beam balance is used to measure what?
Mass (matter= stuff or atoms)
amount of matter inside
Based on the Mass vs Volume graph of 2 substances, which would occupy a larger space 200g of substance A or 200g of substance B?
200 g of substance A because it is less dense
density (ratio means comparing)
Ratio of mass/ volume
calculate the mass of 34 cm^3 of the substance
40.8 g
It can't be. Density is consistent regardless of the size if the material stays the same.
A carrot sinks in water. How small can the carrot be cut to make it float in water?
The mass of 5 mL of water is 5 grams because the density of water is 1.0 g/ mL. You can rearrange the d = m/v formula.
Calculate the MASS of 5 mL of water
21g/ 2 mL = 10.5 g/ mL
Calculate the density of a block of wood that has a mass of 21 grams and a volume of 2 mL
Amount of space an object takes up
Volume
oil is less dense
WHY...does oil float on water?
unit for measuring mass
grams (g)