Chem~Chapter 2 Review UPDATED ACTUAL Questions and CORRECT Answers
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Chem~Chapter 2
Institution
Chem~Chapter 2
Chem~Chapter 2 Review UPDATED
ACTUAL Questions and CORRECT
Answers
What is the difference between an element and a compound? - CORRECT ANSWER-
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 c...
Chem~Chapter 2 Review UPDATED
ACTUAL Questions and CORRECT
Answers
What is the difference between an element and a compound? - CORRECT ANSWER-
✔✔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.
How can a compound be separated into a simpler substance? - CORRECT ANSWER-
✔✔chemical change
Are new elements/compounds formed when a compound is separated into a simpler
substance? - CORRECT ANSWER- ✔✔yes
What is a chemical change? - CORRECT ANSWER- ✔✔chemical change is the breaking
and forming resulting in new compounds and elements
How tightly packed are the particles in a solid? Does a solid have a definite shape? Does a
solid have a definite volume? - CORRECT ANSWER- ✔✔packed tightly, high density.
yes has a definite shape
yes has a definite volume
How tightly packed are the particles in a liquid? Does a liquid have a definite shape? Does a
solid have a definite volume? - CORRECT ANSWER- ✔✔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? - CORRECT ANSWER- ✔✔not packed at all; low density
no definite shape
yes definite shape
, How many atom are there in one molecule of H^2SO^4? - CORRECT ANSWER- ✔✔7
atoms
What is the intrinsic property? - CORRECT ANSWER- ✔✔does not depend on the amount
of the substance
What is the extrinsic property? - CORRECT ANSWER- ✔✔does depend on the amount of
the substance
What is temperature? - CORRECT ANSWER- ✔✔the measure of the average kinetic
(movement) energy of molecules/atoms
What do you do to get to Kelvin? - CORRECT ANSWER- ✔✔add 273
What is sublimation? - CORRECT ANSWER- ✔✔solid to gas
What is deposition? - CORRECT ANSWER- ✔✔gas to solid
What happens to the water molecules when a liquid water is boiled? - CORRECT ANSWER-
✔✔vibrate and move really fast, which leads to them moving father apart and release into the
air
What is precipitate? - CORRECT ANSWER- ✔✔solid that forms from a liquid solution
What is the law of conservation of matter? - CORRECT ANSWER- ✔✔cannot be created
nor destroyed
Is salt water a pure substance, homogenous mixture, or heterogenous mixture? - CORRECT
ANSWER- ✔✔homogenous
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