Stoichiometry Flashcards
1
Q
Avegadro’s number
A
6.02x10^23 = 1 mol
2
Q
Mass of chemical in compound (From g)
A
Total compound g x atomic mass of chemical / molar mass of compound
3
Q
molar mass of compound
A
The sum of all atomic masses
4
Q
Empirical formula to Molecular formula
A
Divide amu by molar mass and multiply each chemical by the quotient
5
Q
Empirical formula from percentages
A
change percents to grams. Divide each chemical (g) by atomic mass (g) which gives us our mols. Divide each chemical (mol) by smallest quotient (mol). Thats the answer.
6
Q
When finding empirical formula from percentages/grams multiply any .5 mole subscripts by ______, .33/.66 subscripts by ______, .25/.75 subscripts by ______
A
.5 times 2, .33/.66 times 3, .25/.75 by 4
