On a separate piece of paper, show ALL of your hand written work and include the correct units for each calculation. Write the chemical formula for all substances first if not provided.
CALCULATE THE MOLAR MASS FOR THE FOLLOWING COMPOUNDS/ELEMENTS 1-9.
1.
K2SO4
2.
CuO
3.
Barium phosphate chemical formula
molar mass
4.
Cobalt(II) fluoride chemical formula
molar mass
5.
Cu (CN)
Pb (C, H,02)
6.
7.
Tin (IV) chromate
chemical formula
molar mass
8.
Fluorine
chemical formula
molar mass
9.
Calculate the percentage (by mass) of each element in lead (II) acetate.
chemical formula
molar mass
% Pb
%C
% H
% O

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.

Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents