Avogadro's #
What are the units for atomic mass and Avogadro's number?
Atomic Mass: g/mole
Avogadro’s Number: atoms/mole (or molecules/mole)
Al2O3 → Al + O2
2 Al2O3 → 4 Al + 3 O2
Give the formula mass and mass in grams of ZnCl2
136.28 amu, 136.28 g
Convert the following mass to moles: 212.7 g of K2CO3
1.549 moles
How many grams of O2 would be produced if 13.82 g of NaClO3 were reacted?
Balance the equation: NaClO3 → NaCl + O2
How many molecules are in 2.51 g of H2?
AgNO3 + K3PO4 → Ag3PO4 + KNO3
3AgNO3 + 2K3PO4 → 1Ag3PO4 + 3KNO3
Give the formula mass and mass in grams of Al2CO3
113.97 amu, 113.97 g
Convert the following mass to moles: 60.1 g of C2H4O2
1.00 mole
How many grams of Ca(OH)2 are needed to yield 1.86 g of H2O?
Balance the equation: Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O
3.83 g Ca(OH)2
What is the mass of 6.1x1013 molecules CsOH?
1.5 x 10-8 g CsOH
AlI3 + HgCl2 → AlCl3 + HgI2
2AlI3 + 3HgCl2 → 2AlCl3 + 3HgI2
Give the formula mass and mass in grams of C6H12O6
180.06 amu, 180.06 g
Convert the following moles to mass: 1.16 moles of CH4
18.6 g
2.89x1012 g of ethyne (C2H2) combusts to produce how much CO2?
Balance the equation: C2H2 + O2 → CO2 + H2O first.
9.77 x 1012 g CO2
How many atoms are in 2.090x10-4 g of NaIO4?
3.530 x 1018 atoms
Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O
3 Ca(OH)2 + 2 H3PO4 → 1 Ca3(PO4)2 + 6 H2O
Give the formula mass and mass in grams of K3PO4
212.27 amu, 212.27 g
Convert the following moles to mass: 2.80 moles of KBr
333 g
If you have 3.6 g AgNO3, how much AgCl will be produced?
Balance the equation: AgNO3 + NaCl → NaNO3 + AgCl
3.0 g AgCl
How many atoms are in 1.934 g of Cu(OH)2?
5.969 x 1022 atoms
Ca(OH)2 + H3PO4 → Ca3(PO4)2 + H2O
3Ca(OH)2 + 2H3PO4 → 1Ca3(PO4)2 + 6H2O
Give the formula mass and mass in grams of POCl3
153.32 amu, 153.32 g
Convert the following moles to mass: 3.14 moles of Mg(OH)2
183 g
If you reacted 1.09x10-3 g of S8, how many grams of P(C6H5)3S would be produced?
Balance the equation: S8 + P(C6H5)3 → P(C6H5)3S first.
1.00 x 10-2 g P(C6H5)3S