Atoms of different elements differ by the number of neutrons, since there are different
neutrons there would also be different isotopes of that element.
a) 1 O atom, with a mass of 2.66 x 10-23 g
A) 1s2, 2s2, 2p6, 3s2, 3p6 (Ar)
C) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d5 (Mn)
D) s2, 2s2, 2p6, 3s2, 3p6, 4s1 (K)
B) False, Due to the forces of attraction between the ions making them strong they
Pre Lab 8 Exploring the Properties of Gases.
Purpose: To understand how pressure , volume & temperature work and relate to
Pre Lab ?- ZERO
Safety Precautions- Dont burn your self with the heating element.
Materials- Heating E
Prelab 7: Rates of Chemical Reations
Purpose- To understand how different variables such as temperature effects the
rates of chemical reactions.
Prelab ?A) Digestion of food- Fast reaction
Rusting of nail- Slow reaction
Energy in Physical and Chemical Processes
Purpose: To have a better understanding of how heat energy works and that
anything using any kind of physical and or chemical process uses and gives off
Pre Lab ?:
25C 55C = 30C
700L x 30
Determination of a Chemical Formula
Jakub Nowosielski, (Jasmine, Liz (Lab Partners)
Purpose: To understand how to determine compound formulas by using the law of
Pre-Lab ?: Mass of CoCl2 x 6H2O is (58.93+(35x2)70.9 + (12.09
Separating of Food Dyes using Paper Chromatography
Jakub Nowosielski ( and friends)
Purpose: To learn how to use paper chromatography to separate dyes that are used
in colorful coating of M&M candy. Also, how to determine Rf values of common food
Separation of a Mixture 1
Jakub Nowosielski, Liz, Jasmine (lab partners)
To have a better understanding on how to solvents and mixtures work as well as to
learn how to separate mixtures in order to get the pure form of a substance.
Preparation Of Alum
Purpose: to separate compounds from aluminum, by using chemicals. Into other
1) Alum 26.981 x 2 = 52.962mole
2) The amount of alum produce will differ because of the different amo
c) (odd one)
A covalent bond is a bond that shares electrons between atoms in pairs. It is different
from a ionic bond because they just transfer between atoms not share.
Because you would be making a different compound.
See last page.
A) Redox ( Gained electrons)
B) Neutralization ( Contains a salt and H20)
C) Precipitation ( contains a solid)
D) Neutralization ( contains a salt & H2O)
Chem 2200 HW
The difference between a physical change and a chemical change is that a physical
change is a change that does not affect the chemical makeup of a substance or an
object and a chemical change changes the chemi
2 x (6.02 x 1023) = 1.204 x 1024 (1204000000000000000000000 Na+ ions)
16.2 x (6.02 x 1023 ) / 40
There are 2.434*10^23 atoms
Ca atoms in 16.2g of Ca.
C = 12g/mol