Chemistry Stoichiometry: Moles - University of British Columbia
a place of mind
FACULTY OF EDUCATION
Department of Curriculum and Pedagogy
Chemistry Stoichiometry: Conversion Factors
Science and Mathematics Education Research Group
Supported by UBC Teaching and Learning Enhancement Fund 2012-2013
Conversion Factors
Best Practices I
Example 1 ? Unit conversion: Convert 58 km/h and into m/s
km ... m km km m h m
h
s h h km s s
58 km 58 km 1000 m 1 h 58 m 16 m
h
h 1 km 3600 s 3.6 s
s
Best Practices II
Example 2 ? Dimensional analysis: How many molecules are there in 4.5 g of NaCl? The molar mass of NaCl is 58.5 g/mol
grams of NaCl moles of NaCl molecules of NaCl
4.5
g
1
mol
6.022 1023
molecules
4.6 1022
molecules
58.5 g
1 mol
Conversion Factors I
What is the correct calculation to find the amount of moles in a 12.5 g sample of CuSO4?
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