What is anything that has mass and takes up space. An element, compound, or mixture
100
What is the formula for density?
What is the ratio of mass to volume
100
What is a mixture?
What is a combination of substances that are not chemically combined.
100
What is a physical property?
What is a characteristic of a substance that can be observed without changing the identity of the substance
100
What is a physical change?
A change that occurs without changing the identity of the substance.
200
Carbon
What is an element
200
What is density?
The amount of mass a particular volume of matter has
200
Is a bag of trail mix an example of a homogeneous or heterogeneous mixture?
What is heterogeneous.
200
What is a chemical property?
A chemical property describes how a substance changes into a new substance.
200
What is a chemical change?
A change that happens when one or more substances change into new substances with different properties.
300
water
What is a compound
300
Calculate the density of a 60g sample of matter that is held in a 120mL beaker.
What is .5g/mL
300
Is lemonade dissolved in water a homogeneous or heterogeneous mixture?
What is homogeneous.
300
Is flammability a chemical or physical property? Why?
What is chemical. When a substance is burned it changes into a new substance.
300
Do you use chemical changes to separate compounds or mixtures? Why?
What is compounds. Compounds are chemically combined so they require chemical changes to separate them.
400
Iron
What is an element
400
What is the mass of a sample of silver that has a density of 5g/mL and a volume of 20mL.
What is 100g.
400
You have a mixture of sand, salt, and water. Identify the homogenous mixtures and the heterogeneous mixtures and identify how you would separate the homogeneous mixture(s) in this example.
The sand and water, and the salt and sand are heterogeneous. The salt and water are homogeneous. To separate them you can boil away the water.
400
What is solubility? Is it a chemical or physical property.
What is the ability to dissolve. Physical because the substance does not change chemically even though it may not be visible.
400
Name 3 ways you can tell a chemical change has occurred.
What is color change, fizzing, foaming, the production of light, heat, odor, or sound
500
Carbonated soda. Explain why?
What is a mixture. Sugar, water, carbon dioxide (bubbles), and flavorings mixed together in a homogeneous mixture.
500
If a 2g sample of carbon has a density of .5g/ml. How much space will it take up?
What is volume=4mL
500
Explain how a compound and a heterogeneous mixture are different.
A compound is combined chemically a homogeneous mixture is not!
500
Why are states of matter physical properties?
Because you are not changing the chemical components of the matter when changing state
500
Explain why heating ice until it melts into water is a physical change, while melting sugar into a brown liquid is a chemical change?
When water changes states from solid to liquid or from liquid to gas it is still water. When sugar is heated however, chemical bonds are changed resulting in a new substance. You can tell because there is a color change.