1. ___________ is the sum total of the kinetic and potential energy of a substance.
2. How many moles of oxygen gas (O₂) are required to completely react with 2 moles of hydrogen gas (H₂) to form water (H₂O)?
3. What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?
4. Which of the following statements about chemical equilibrium is true?
5. The equation relating Ke and Kp is:
6. The enthalpy change for a reaction is positive. What does this indicate about the reaction?
7. The bond energies in C-C, C=C, and C≡C bonds increase in the following order:
8. The equation that illustrates the wave-particle duality nature of matter is:
9. How many grams of oxygen are there in a 50L gas cylinder at 21°C when the oxygen pressure is 15.7 atm? (R = 0.0821 L.atm/K.mole)
10. A polar molecule is the one with:
11. Which of the following statements about isotopes is correct?
12. The state reached by a reaction mixture when the rates of the forward and backward reactions have become equal is known as:
13. What volume will 2.0 moles of an ideal gas occupy at STP?
14. ___________ is a quantitative measure of the degree of charge separation in a molecule.
15. In which of the following molecules does the Sulfur atom have an expanded octet? I. SO₂ II. SF₄ III. SO₂Cl₂ IV. SF₆
