Atomic Structure
Protons, neutrons, electrons
What are the two pure substances?
Elements and compounds
Is there such thing as a “ideal” gas?
No, under conditions of high temperature and low pressure enable “real” gases like hydrogen and helium to behave “ideally”. But are not ideal
What is a solution?
Homogeneous mixture of two or more substances
What’s Mr. Freidberg’s cats name?
Boo
What is the atomic number of an atom?
Number of protons
Example of a Homogenous mixture:
salt water etc.
What are the three variables of a gas?
1. temperature
2. volume
3. pressure
What are some examples of supersaturated solutions? Name two.
Honey, carbonated water, soda sodium acetate in water sugar syrup, rock candy
What’s Mr. Frieberg‘s favorite color?
Red
What is the mass number of sodium (Na)?
23
What is the difference between heterogeneous and homogeneous?
A heterogeneous mixture is a mixture in which the components of the mixture are not uniform or have localized regions with different properties and a homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.
What are the conditions of “ideal” gases that make particles spread out?
High temperature and low pressure
The component that dissolves the other component is called?
solvent
How tall is Mr. Freiberg?
5 foot 7 3/4
Who proposed the atomic theory first?
John Dalton
What is a physical change
Changing the form of a substance without changing the identity
A gas occupies 100 mL at 150 kPa. find its volume at STP
P2= 101.3kPaP1V1 = P2V2
V2 =148.1
What is the percent by mass of the solution that contains 20.0 g NaCl in 800.0 grams of water?
2.4%
Where did Mr. Freiberg get his masters?
Stony Brook
Which electron shell has the most energy?
4th shell
What phase is sulfur at 143 C
Liquid
What is ERNI
Elastic collisions
Random straight line motion
No IMFS (intermolecular forces)
Insignificant
Determine the molarity for the following solution.
0.444 MOL of CoCl2 in 0.654 L of solution
.679 M
How many nieces and nephews does Mr. Freiberg have?
7