Nt1310 Unit 6 Question Paper
Quiz 1- 4,5,12
Quiz 3- 14, 16, 18
14. What is the electron configuration for aluminum? 1s22s22p63s23p1
16. The number of electron levels in a magnesium atom is 3, because magnesium is in period number 3.
18. What is the abbreviated electron configuration for nickel (atomic number 28)? [Ar]4s23d8
Quiz 5- 4,14, 18
5. The ion of aluminum is Answer: Al3+.
14. How many valence electrons are in the electron-dot structure of H2O?
Answer: The number of valence electrons in H2O is = (2 x 1) + (1 x 6) = 8 electrons.
18. The shape of the carbon tetrachloride molecule is Answer: tetrahedral
Quiz 6- 1,3,18
1. What coefficient is placed in front of O2 to complete the balancing of the following equation?
C5H8 +? O2 …show more content…
→ 5CO2 + 4H2O Answer: 7
3. What is oxidized and what is reduced in the following reaction?
2Al(s) + 3Br2(g) → 2AlBr3(s).
Answer: Al (goes from oxidation state 0 to +3) is oxidized and Br2 (goes from oxidation state 0 to -1) is reduced.
18. How many grams of CO2 are produced from 125 g of O2 and excess CH4 ? CH4 + 2O2 → CO2 + 2H2O
Answer: 85.9 g of CO2
Quiz 8- 10,15,19
8.When solutions of KCl and Pb(NO3) 2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs?
2KCl (aq) + Pb(NO3) 2(aq) → 2 KNO3(aq) + PbCl2 (s)
15. What is the molarity of a solution that contains 17 g of NH3 in 0.50 L of solution?
2.0 M
19.
What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?
0.75 L
Quiz 9- 3,9,12
3. For the following equilibrium reaction, which cause and effect are correctly matched?
CO(g) + 2H2(g) CH3OH(g) + heat remove H2, shift left
9. Which of the following equilibrium constants indicates the reaction that gives the smallest amount of product?
Kc = 5 × 10-10
12. The reaction for the decomposition of PCl5 to chlorine and PCl3 is shown below.
PCl5(g) PCl3(g) + Cl2(g)
If the equilibrium concentrations are [PCl5] = 1.0 M, [PCl3] = 0.10 M, [Cl2] = 0.10 M, what is the value of the equilibrium constant?
1.0 × 10-2
Quiz 10- 4,7,15
4. The conjugate base of HClO3 is Answer: ClO3 –
7. What is the pH of a solution with [H3O+] = 1 x 10-9 M? Answer:
15. 25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution. The molarity of the NaOH solution is Answer:
Quiz 7- 5,9,17 5.The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant? 1170ml |
9. A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP? 17L
17. At STP, what is the volume of 4.50 moles of nitrogen gas? 101
L
Quiz 4- 9,15, 16
9. When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope is produced? aluminum-28
15. The half-life of bromine-74 is 25 min. How much of a 4.0 mg sample is still active after 75 min? 0.50 mg
16. In the sun, nuclei of hydrogen combine to form a larger nucleus and release a great amount of energy. The process is known as fusion.
Quiz 3- 14, 16, 18
14. What is the electron configuration for aluminum? 1s22s22p63s23p1
16. The number of electron levels in a magnesium atom is 3, because magnesium is in period number 3.
18. What is the abbreviated electron configuration for nickel (atomic number 28)? [Ar]4s23d8
Quiz 5- 4,14, 18
5. The ion of aluminum is Answer: Al3+.
14. How many valence electrons are in the electron-dot structure of H2O?
Answer: The number of valence electrons in H2O is = (2 x 1) + (1 x 6) = 8 electrons.
18. The shape of the carbon tetrachloride molecule is Answer: tetrahedral
Quiz 6- 1,3,18
1. What coefficient is placed in front of O2 to complete the balancing of the following equation?
C5H8 +? O2 …show more content…
→ 5CO2 + 4H2O Answer: 7
3. What is oxidized and what is reduced in the following reaction?
2Al(s) + 3Br2(g) → 2AlBr3(s).
Answer: Al (goes from oxidation state 0 to +3) is oxidized and Br2 (goes from oxidation state 0 to -1) is reduced.
18. How many grams of CO2 are produced from 125 g of O2 and excess CH4 ? CH4 + 2O2 → CO2 + 2H2O
Answer: 85.9 g of CO2
Quiz 8- 10,15,19
8.When solutions of KCl and Pb(NO3) 2 are mixed, a precipitate forms. Which of the following is the balanced equation for the double replacement reaction that occurs?
2KCl (aq) + Pb(NO3) 2(aq) → 2 KNO3(aq) + PbCl2 (s)
15. What is the molarity of a solution that contains 17 g of NH3 in 0.50 L of solution?
2.0 M
19.
What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?
0.75 L
Quiz 9- 3,9,12
3. For the following equilibrium reaction, which cause and effect are correctly matched?
CO(g) + 2H2(g) CH3OH(g) + heat remove H2, shift left
9. Which of the following equilibrium constants indicates the reaction that gives the smallest amount of product?
Kc = 5 × 10-10
12. The reaction for the decomposition of PCl5 to chlorine and PCl3 is shown below.
PCl5(g) PCl3(g) + Cl2(g)
If the equilibrium concentrations are [PCl5] = 1.0 M, [PCl3] = 0.10 M, [Cl2] = 0.10 M, what is the value of the equilibrium constant?
1.0 × 10-2
Quiz 10- 4,7,15
4. The conjugate base of HClO3 is Answer: ClO3 –
7. What is the pH of a solution with [H3O+] = 1 x 10-9 M? Answer:
15. 25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution. The molarity of the NaOH solution is Answer:
Quiz 7- 5,9,17 5.The temperature of a 500. mL sample of gas increases from 150. K to 350. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant? 1170ml |
9. A gas sample contains 4.0 g of CH4 and 2.0 g of He. What is the volume of the sample at STP? 17L
17. At STP, what is the volume of 4.50 moles of nitrogen gas? 101
L
Quiz 4- 9,15, 16
9. When aluminum-27 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope is produced? aluminum-28
15. The half-life of bromine-74 is 25 min. How much of a 4.0 mg sample is still active after 75 min? 0.50 mg
16. In the sun, nuclei of hydrogen combine to form a larger nucleus and release a great amount of energy. The process is known as fusion.