Question 1: Biotechnology has allowed us to genetically modify corn with a gene that acts as a pesticide. What could be a possible environmental impact of this development?
- Insects resistant to the specific pesticide would develop over time.
- The surplus of corn would rot and decay releasing additional greenhouse gases.
- The price of corn would drop dramatically because of a greater supply with no increase in demand.
- Countries able to buy the new corn seeds would see increases in their economy and pollution would rise.
Question 2: What would happen if CH4 was removed from the following reaction that has reached equilibrium
CO (g) + 3H2 (g) CH4 (g) + H2O (g)
- The reaction would not be affected.
- The equilibrium would shift to the right.
- The equilibrium would shift to the left.
- The product concentration would equal the reactants.
Question 3: If the half-life of Technitium-104 is 18.0min, how much of a 14.2g sample will remain after 72 minutes?
- 3.55g
- 1.78g
- 0.888g
- 0.444g
Question 4: How many milliliters of a 1.25 molar hydrochloric acid (HCl) solution would be needed to react completely with 60.0 grams of calcium metal?
Ca (s) + 2HCl (aq) CaCl2 (aq) + H2 (g)
- 1200 ml
- 2400 ml
- 3750 ml
- 9600 ml
Question 5: Which of the following statements is not true of gamma radiation?
- Gamma rays have no mass.
- Gamma rays severely damage living cells.
- Gamma rays are high frequency electromagnetic waves.
- Gamma rays are deflected toward the positive terminal in a magnetic field.