1. Chemistry Spring Midterm Review

2. Moles
What is the molar mass of H2SO4?

3. Moles
How many grams of H2SO4 are there in 49 moles of H2SO4?

4. Moles
How many moles are there in 375 g of H2O?

5. Moles
How many atoms are there in 7 moles of NaCl?

6. Moles
How many molecules are there in 5g of KCl?

7. Stoichiometry Na + Cl2  NaCl
How many moles of Cl2 are needed to completely react with 3 moles of Na?

8. Stoichiometry
N H  NH3
How many grams of hydrogen are necessary to react completely with 50.0 grams of nitrogen in the equation?

9. Stoichiometry
H O  H2O
If 30mL of hydrogen are produced in the above reaction, how many millimeters of oxygen are produced?

10. Stoichiometry
H O  H2O
A 200 g sample of H2 reacted with 300 g of O2. How much water can be created?

11. Stoichiometry
N H  NH3
How many moles of H2 are needed to completely react with 5 moles of N2?

12. Energy Transfer
Recognize all the variables of:
q = nCΔT

13. Energy Transfer
The molar heat capacity of tungsten is 24.2 J/K*mol. Calculate the energy as heat needed to increase the temperature of 0.40 mol of tungsten by 10.0K.

14. Energy Transfer
A 0.07 mol sample of octane absorbed 3.5 x 103 J of energy. Calculate the temperature increase of octane if the molar heat capacity of octane is J/K*mol.

15. Energy Transfer Be able to distinguish Endothermic and Exothermic
Recognize a potential energy diagram and what it means

16. Bond Enthalpy
Know how to calculate Bond Energies and if they are endothermic or exothermic
DH0 = total energy input – total energy released
= SBE(reactants) – SBE(products)