Compounds and Mixtures!
What are the 2 types of Pure Substances?
Compounds and Elements!
What type of bind will NaCl form?
What wavelength can humans see at?
400 - 700 nm
You have 8 science books and 30 math books for a total of 38 books. What is the % comp of math books?
78.9%
How many protons are in S?
16
What type of substances CANNOT be broken apart by physical processes?
A COMPOUND!! Ex: water
What type of bon will SO form?
A covalent bond
What is the relationship between wavelength and frequency?
As wavelength goes up, frequency goes down. And vice versa!
A solution is made using 30g of sugar in 500g water. What is the % comp of sugar?
% comp = (mass of solute/mass of solution) x 100
6%
How many electrons are in N?
7
How can you tell when a solution is saturated?
When it CANNOT dissolve any more solute!
What is the difference between polar covalent and nonpolar covalent?
Polar covalent means that the electrons are NOT shared equally!
One side will have a partially positive charge and one side will have a partially negative charge!
Who can tell me the labels in the following diagram?
Wavelength, trough, crest, amplitude
How many neutrons are in P?
16
Give me an example of a heterogenous mixture?
example!!
What ions will the following form?
Na
Cl
S
+1
-1
-2
C = wavelength x frequency
C = 3.00 x 10^8
66.7 Hertz
What is the % comp of O in CO2?
Atomic mass O = 16
Atomic mass C = 12
% comp = (mass of element / mass of whole compound) x 100
72.7% O
What group is carbon in?
How many valence electrons does Carbon have?
4
4
Is CO2 a mixture or a compound and why?
Compound!
Draw the electron dot structure for CO2
Must draw on white board
Calculate Wavelength if the frequency is 6.7 x 10 ^ -4
C= wavelength x frequency
c = 3.00 x 10 ^8 m/s
447761194030
4.5 x 10^11
Cow's milk contains 6.2% lactose. Calculate the amount of lactose present in 200g milk.
% comp = (mass of solute/mass of solution) x 100
12.4g
What is the group and period of Xe?
G = 8
P = 5