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Group Quiz
CHM 134
Dr. Foy
1.
How many moles of H atoms and how many H atoms are present in each of the
following?
# moles H
# atoms H
1.05 g of H atoms
6.335 g H2 molecules
0.14433 g H2O molecules
2.
Calculate the molar mass of Arsenic in grams/mol given the following data:
isotope
3.
natural abundance
isotope mass (grams/mol)
74
As
45.99%
74.0001
75
As
15.90%
75.00009
76
As
38.11%
76.0002
Fill in the table
Formula
Chemical Name
KMnO4
SrCl2
copper(II) sulfide
aluminum oxide
MoCl3
AsO5
tin
hydrochloric acid
beryllium sulfide
zinc acetate
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