Molar Masses
What is the molar mass of Carbon?
12.011 g/mol OR 12 g/mol
HC3H3O3 → C2H4O + CO2
If 2.5 moles of CO2 are produced, how many moles of HC3H3O3 were reacted?
2.5 moles HC3H3O3
2C7H6O2 + 15O2 → 14CO2 + 6H2O
If 300 grams of 2C7H6O2 (molar mass 122.12 g/mol) are reacted, how many grams of H2O (molar mass 18.02 g/mol) will be produced?
132.80 grams OR 100 grams
8H2S + 8Cl2 → S8 + 16HCl
If 122 grams of Cl2 are reacted, how many grams of S8 will be produced?
55.2 grams S8
NH3 → N2 + H2
If 433.10 grams of H2 are produced, how many grams of N2 will also be produced?
2006.2 grams N2
What is the molar mass of O2?
31.998 g/mol OR 32 g/mol
2C2H3Cl + 5O2 → 4CO2 + 2H2O + 2HCl
If 4 moles of H2O are produced, how many moles of O2 were reacted?
10 moles O2
Ca(OH)2 + H3PO4 → CaHPO4 + 2H2O
If 250 grams of H3PO4 (molar mass 98 g/mol) are reacted, how many moles of H2O will be produced?
5.1 moles H2O
2H2O + 2F2 → 4HF + O2
If 260 grams of HF are produced, how many grams of O2 will also be produced?
103.96 grams OR 1.0 x 102
La + I2 → LaI3
If 3.8 moles of I2 are reacted, how many grams of LaI3 will be produced?
1300 grams LaI3
What is the molar mass of CH4?
16.043 g/mol OR 16 g/mol
Al2(SO4)3 + 3Ca(OH)2 → 2Al(OH)3 + 3CaSO4
If 3 moles of Al(OH)3 are produced, how many moles of Al2(SO4)3 were reacted?
1.5 moles Al2(SO4)3
Sig figs: 2 moles
2Na + Cl2 → 2 NaCl
If 3.5 moles of NaCl are produced, how many moles of Cl2 were reacted?
1.75 moles Cl2 OR 1.8 moles
3Ba + 2 Al(NO3)3 → 3Ba(NO3)2 + 2 Al
If 12.02 grams of Al are produced, how many grams of Ba were reacted?
91.77 grams Ba
Ag2O → Ag + O2
If 0.68080 moles of Ag are produced, how many grams of O2 will also be produced?
5.4462 grams O2
What is the molar mass of C6H12O6?
180.156 g/mol OR 180 g/mol
2NaCl → 2Na + Cl2
If 4 moles of Na are produced, how many moles of Cl2 will also be produced?
2 moles Cl2
2C6H6 + 15O2 → 12CO2 + 6H2O
If 4 moles of O2 are reacted, how many grams of H2O (molar mass 18.02 g/mol) will be produced?
28.83 moles H2O OR 30 moles
2AgNO3 + MgCl2 → 2AgCl + Mg(NO3)2
If 3.6 moles of AgCl are produced, how many moles of MgCl2 were reacted?
1.8 moles MgCl2
TiCl2 + O2 → TiO + Cl2
If 279 grams of O2 are reacted, how many grams of TiCl2 will also be reacted?
2070 grams TiCl2
What is the molar mass of Cr4(P2O7)3?
729.807 g/mol OR 730 g/mol
2HF + Sr(OH)2 → SrF2 + 2H2O
If 3 moles of SrF2 are produced, how many moles of HF were reacted?
6 moles HF
4Fe + 3O2 + 6H2O → 4Fe(OH)3
If 400 grams of Fe (molar mass 55.85 g/mol) are reacted, how many grams of O2 (molar mass 32 g/mol) will also be reacted?
171.89 grams O2 OR 200 grams
PCl5 + 4 H2O → 5 HCl + H3PO4
If 127.56 grams of PCl5 are reacted, how many moles of H2O will also be reacted?
2.4503 moles H2O
HClO4 + Ca(OH)2 → Ca(ClO4)2 + H2O
If 172.46 grams of Ca(OH)2 are reacted, how many grams of HClO4 will also be reacted?
467.66 grams HClO4