Answer:
Explanation:58.5g NaCl(mol/58.5g)(6.02 x 1023/mol) = 6.02 x 1023 Na
+
Cl21 pre-1982 pennies (after 1982 pennies are mostly zinc with copper coating)
63.5g Cu( mol/ 63.5g)(6.02 x 1023/mol) = 6.02 x 1023 Cu
19.0g Al (mol/27.0g)(6.02 x 1023/mol) = 4.24 x 1023 Al
Demo of Oxidation Reactions
Flash bulb
2Mg + O2 2MgO fast
2Cn + O2 2CnO slow
Copper Oxide Penny
2Cu + O2 2CuO
Intro to Chapter
Stoichiometry is the process of making calculations based on formulas and balanced equations
Since Modern Chemistry involves:
Symbolic representation of models
Mathematics
Quantitative measurements
You are going to be using lots of symbols and equations and doing lots of calculations
The fundamental Question –
How do you go from combining ratio of atoms (like H2O) to something you can measure in lab?
OR How do you go between number of ato
