Number your answers, and show your work. Be sure to give answers with the correct units.
Calculate the molecular weight of the following compounds:
1. Ca3N2 ____________________
2. Li3PO4 ___________________
3. NH4NO3 ____________________
Number your answers, and show your work. Be sure to give answers with the correct units.
Calculate the number of moles in 10.0 grams in the following compound:
1. NH4NO3 ____________________
Calculate the number of grams of each in 0.0500 mol in the following compound:
2. Li3PO4 ____________________
Calculate the percent of each element present in the following compounds:
1. Na2SO4 Na = __________ S = __________ O = __________
2. Ca(NO3)2 Ca = __________ N = __________ O = __________
Determine the empirical formula for the following compound % compositions:
1.) 52.56% Fe, 2.83% H, 44.91% O
2.) 71.98% C, 6.71% H, 21.31% O
BALANCE THE FOLLOWING EQUATIONS:
1. SrBr2 + (NH4)2CO3 → SrCO3 + NH4Br
2. FeS2 + O2 → Fe2O3 + SO2
Determine which of the following double replacement reactions will occur using the solubility rules and complete the equations that do:
1.) Ca+2, 2 Cl-1 + Al+3, 3 NO3-1 →
2.) Pb+2, 2 NO3-1 + 2 Na+1, 2 Br-1 →
Determine which of the following single replacement reactions will occur using the activity series and complete the equations that do:
1.) Cl2 + 2 F-1 →
2.) Ba + Fe+2 →
Balance the following equations and label each reactions as either (1) Combination, (2) Decomposition, (3) Combustion, (4) Double Replacement or (5) Single Replacement.
3. C6H12O6 + O2 → CO2 + H20
4. HCl + NaOH → NaCl + H2O
5. Al + Fe(NO3)3 → Fe + Al(NO3)3
6. S + O2 → SO3
7. H2SO4 → SO3 + H2O
Show the calculation of the oxidation number (charge) of ONLY the atoms which are changing in the following redox equations and then show how those charges are used to balance the following redox equations:
1. Mn(NO3)2 + NaBiO3 + HNO3 → HMnO4 + Bi(NO3)3 + NaNO3 + H2O
2. NaCrO2 + NaClO + NaOH → Na2CrO4 + NaCl + H2O
Complete the following calculations and show your work. Be sure to give answers with the correct units.
1. How many grams of SO2 would be formed from 60 grams of FeS2 in the following reaction?
4 FeS2 + 11 O2 → 2 Fe2O3 + 8 SO2
2. How many moles of NH4NO2 would be required to form 25 grams of N2 in the following reaction?
NH4NO2 → N2 + 2 H2O
Complete the following calculations and show your work. Be sure to give answers with the correct units.
1. Show the calculation of the mass percent of solute in a solution made by dissolving 15.9 grams of Ca3(PO4)2 in 350 grams of water.
2. Show the calculation of the molality of a solution made by dissolving 15.9 grams of Ca3(PO4)2 in 400 grams of water.
3. Show the calculation of the molarity of a solution made by dissolving 15.9 grams of Ca3(PO4)2 to make 350 ml of solution.
4. Show the calculation of the mass of Ca3(PO4)2 needed to make 200 ml of a 0.128 M solution.
5. Show the calculation of the volume of 0.238 M solution which can be prepared using 13.4 grams of Ca3(PO4)2.