Practice 3/30
What is the density of CO gas if 0.196 g occupies a volume of 100 ml?
0.00196 g/ml
A certain gas expands to fill a 3 L container. Its mass is measured to be 0.6 kg. What is its density?
0.2 kg/L
A metal ball has a mass of 2kg and a volume of 6 m3. What is its density?
0.33kg/cm^3
A block of wood 3 cm on each side has a mass of 27 g. What is the density of the block? (Hint, don't forget to find the volume of the wood.)
1 gcm^3
What is the volume of a marble that has a mass of 3 g and d density of 2.7 g/ml?
1.11ml
A solid is 5 cm tall, 3 cm wide and 2 cm thick. It has a mass of 129 g. What is its density?
4.3 g/cm^3
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?
5 g/ml
A 10.0 cm3 sample of copper has a mass of 89.6 g. What is the density of copper?
8.96 g/cm^3
0.011 g/mL
A 2.75 g sample of a substance occupies a volume of 250.0 mL. Find its density in g/mL.
Indicator
A compound that can change color depending on conditions such as pH
7.57 g/mL
A sample of gold (Au) has a volume of 9.5 mL. If the sample is found to have a mass of 71.9 g, find the density of gold.
Strong base
A substance that is 12 on the pH scale is probably a:
Strong acid
A substance that is 2 on the pH scale is probably a:
Weak acid
A substance that is 6 on the pH scale is probably a:
Neutral
A substance that is 7 on the pH scale is said to be
Weak base
A substance that is 9 on the pH scale is probably a:
Releases a bunch of cations (H+) and very few Anions (OH-)
Acids in water
Negatively charged ion (OH-)
Anion
Acid
Any compound that contains H+ ions: pH 0-6
Base
Any compound that contains OH- ions : pH 8-14
Releases a bunch of anions (OH-) and very few cations (H+)
Bases in water
Five mL of ethanol has a mass of 3.9 g, and 5.0 mL of benzene has a mass of 44 g. Which liquid is denser?
Benzene
Positive charged ion (h+)
Cation
Acid-forming compounds being released in the atmosphere
Causes acid rain
22 mL
Find the volume that 35.2 g of carbon tetrachloride will occupy if it has a density of 1.60 g/mL
Silver has a density of 10.5 grams/cm3 and gold has a density of 19.3 g/cm3. Which would have the greater mass, 5cm3 of silver or 5cm3 of gold?
Gold
Acids have _____ hydrogen ions than bases
More
PHysical changes
Ones that can be reversed
Chemical changes
Ones that cannot be undone
An example of a chemical change
Rust
Base Property
Tastes bitter
Acid Property
Tastes sour
Density
The amount of mass in a specific volume
Mass
The amount of matter in an object
Volume
The amount of space an object takes up
HCl
The chemical formula for hydrochloric acid
118.35 g
The density of ethanol is 0.789 g/mL. Find the mass of a sample of ethanol that has a volume of 150.0 mL.
10,132 g
The density of silver (Ag) is 10.5 g/mL. Find the mass of Ag that occupies 965 mL of space.
A reaction between iron, water, oxygen (air) and sometimes salt
The formation of rust
Density = mass / volume
The formula for Density
Mass = Volume x Density
The formula for mass
Volume = Mass x Density
The formula for volume
Length x Width x Height
The formula for volume of a solid
The stomach
The part of the body where hydrochloric acid is naturally found
pH
The value that is used to express the acidity or basicity of a system
In terms of volume, how do ml and cm3 relate to one another?
They are equal. One ml is equal to one cm3
Acids & Bases both conduct electricity because
They both have charged ions
Bases on litmus
Turn the litmus blue
Acids on litmus
Turns the litmus red
21.4 g/cm³
What is the density of a ring that has a mass of 4.53 g and a volume of 0.212 cm³?
pH scale
scale from 0-14 to indicate the acidity or basicity of a substance
Neutralization
the reaction of an acid and base to form a neutral solution of water and salt
