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 → 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...