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Chemical Formulas/Laws
No. of atoms/moles
Gram Formula Mass
Percent Composition
Mole/Volume/Mass Ratio
100
Chemical formula in smallest whole number ratios
What is an empirical formula?
100
Total number of C atoms in C2H6
What is 2?
100
Gram formula mass of N2
What is 28
100
Percent composition of O in FeO
What is 22.2%
100
K2 + Cl2 --> 2KCl Total moles of KCl produced when 4 moles of K2 are used
What is 8?
200
Actual chemical formula of a substance
What is a molecular formula?
200
Total number of O atoms in Ca3(PO4)2
What is 8?
200
Gram formula mass of FeO
What is 72
200
Percent composition of Ca in Ca(OH)2 (Gram formula mass of Ca(OH)2 is 74)
What is 54%
200
K2 + Cl2 --> 2KCl Total moles of Cl2 needed to produce a mole of KCl
What is 0.5?
300
Chemical formula that show the bonding between atoms
What is a structural formula?
300
Number of different atoms in CH3COONa
What is 4?
300
Gram formula mass of Ca(OH)2
What is 74
300
Percent composition of C in Na2CO3
What is 11.3%
300
2KClO3 --> 2KCl + 3O2 Total number of moles of O2 produced from 6 moles of KClO3
What is 9?
400
Equal volume of gases contain equal number of molecules
What is Avogadro's law?
400
Total number of moles of sulfur atoms in Al2(SO4)3
What is 3?
400
Gram formula mass of Fe3(PO4)2
What is 358?
400
Percent composition of water in Na2SO4.3H2O (Gram formula mass of Na2SO4.3H2O is 232)
What is 23.2%
400
2KClO3 --> 2KCl + 3O2 Total number of liters of O2 produced from 1 mole of KClO3
What is 33.6 liters?
500
This compound has an empirical formula CH C2H4 C6H6 C3H8 C4H10
What is C6H6?
500
Total number of moles of atoms in (NH4)2O
What is 11?
500
Gram formula mass of Al2(SO4)3.5H20
What is 432?
500
Percent composition of water in CuSO4.5H2O (Gram formula mass of CuSO4.5H2O is 250)
What is 36%
500
2KClO3 --> 2KCl + 3O2 Total number of moles of KCl produced when 33.6 liters of O2 is produced
What is 1 mole?