Chem~Chapter 2 Review

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What is a pure substance?

1 element or 1 compound?

How many atom are there in one molecule of H^2SO^4?

7 atoms

What are the similarities and differences between a mixture and a compound?

Both have a combination between 2 or more substances mixture: physical combination compound: chemically

When a mixture is separated, are new elements/compounds formed?

No

What is crystallization?

a separation technique that is used to separate a solid that has dissolved in a liquid and made a solution

What do you do to get to Kelvin?

add 273

What is the law of conservation of matter?

cannot be created nor destroyed

Is a chemical reaction a chemical or physical change?

chemical

Is baking soda and vinegar a chemical or physical change?

chemical

Is burning wood a chemical or physical change?

chemical

Is iron rust a chemical or physical change?

chemical

How can a compound be separated into a simpler substance?

chemical change

What is a chemical change?

chemical change is the breaking and forming resulting in new compounds and elements

What is the extrinsic property?

does depend on the amount of the substance

What is the intrinsic property?

does not depend on the amount of the substance

What is the difference between an element and a compound?

element: cannot be separated into a simpler substance, it has no bonds and can be made up of ONLY ONE kind of atom. compound: 2 or more substances chemically combined, has bonds, and can be made up of more than one atom.

What is deposition?

gas to solid

Is chocolate chip cookie dough a pure substance, homogenous mixture, or heterogenous mixture?

heterogenous

Is cookie dough a pure substance, homogenous mixture, or heterogenous mixture?

heterogenous

Is granite a pure substance, homogenous mixture, or heterogenous mixture?

heterogenous

Is steel a pure substance, homogenous mixture, or heterogenous mixture?

heterogenous

Is Kool aid a pure substance, homogenous mixture, or heterogenous mixture?

homogenous

Is Xenon gas a pure substance, homogenous mixture, or heterogenous mixture?

homogenous

Is air a pure substance, homogenous mixture, or heterogenous mixture?

homogenous

Is salt water a pure substance, homogenous mixture, or heterogenous mixture?

homogenous

Is water a pure substance, homogenous mixture, or heterogenous mixture?

homogenous

How tightly packed are the particles in a liquid? Does a liquid have a definite shape? Does a solid have a definite volume?

less tightly packed; less density no definite shape yes definite shape

How tightly packed are the particles in a gas? Does a gas have a definite shape? Does a solid have a definite volume?

not packed at all; low density no definite shape yes definite shape

How tightly packed are the particles in a solid? Does a solid have a definite shape? Does a solid have a definite volume?

packed tightly, high density. yes has a definite shape yes has a definite volume

What is filtration?

passing mixture over small holes that allows liquid to pass but not the solids

Is boiling water a chemical or physical change?

physical

Is gasoline evaporates a chemical or physical change?

physical

Is making a smoothie a chemical or physical change?

physical

Is steel melting a chemical or physical change?

physical

Is C^6H^12O^6 a pure substance, homogenous mixture, or heterogenous mixture?

pure substance

Is Sodium Chloride a pure substance, homogenous mixture, or heterogenous mixture?

pure substance

What is chromatography?

separation technique that is used to separate and identify the components of a mixture

What is precipitate?

solid that forms from a liquid solution

What is sublimation?

solid to gas

What is distillation?

take advantage of boiling points

What is temperature?

the measure of the average kinetic (movement) energy of molecules/atoms

What happens to the water molecules when a liquid water is boiled?

vibrate and move really fast, which leads to them moving father apart and release into the air

Are new elements/compounds formed when a compound is separated into a simpler substance?

yes


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