MENTS 1. Pre-Lab Assignment
2. Data Sheet
3. Post-Lab Assignment
VIDEO CLIPS
Dr Dan Videos on Molecular Models - will be provided on Canvas
LABWARE & CHEMICALS
Molecular Model Kit
.
PROCEDURE(S)
A. DRAWING LEWIS DOT STRUCTURES
Drawing Lewis structures takes time and practice, and there is no single set of steps that
will always yield the correct answer. Expect to occasionally draw several incorrect
models before you find the correct one. Learn from each incorrect model
what does and
does not work, and apply it to drawing future Lewis structures. The general rules below
will generally lead to the correct structure in one or two attempts.
Perform the following:
1. Add up the valence electrons
a) Add up the valence electrons for all atoms (s and p orbitals with the highest
quantum number)
b) Add electrons for molecules with a negative charge (eg: CO32-)
c) Subtract electrons for molecules with a positive charge (eg: NH4+)
2. Write a trial structure
a) Place the least electronegative atom in the center
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The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

Acontainer holds 35.8 moles of gas under 10.0 atm of pressure at 70.0 c. what is the volume of the container?

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?