Practice 3/30

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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


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