CHEM 1110 Study Guide - Midterm Guide: European Route E6, Xenon Difluoride, Bromine

2. Circle the most appropriate answer (- 1 points if not doe 3. Write the letter on the blank in the left margin of the question number (-1 points if not done) 1. What is the noble gas core for CI? e. Kr d. Ar a. Xe b. Ne c. Rn Nb atom? 一一, which of the following electron configurations correctly represents the a. [Kr] 3d d. [Ar] 5s 4d e. [Ar] 4s 3d b. [Kr] 5s'4d _3. What element is represented by the electron configuration [Ar] 4s3d"4p? a. T b. 2r c. Sn d. Ga e. In 4. Alkali Metals exhibit the lowest first ionization energy. Which family of elements do you expect to exhibit the highest first ionization energy (IE:)? a. Halogens b. Pnictogens c. Chalcogens d. Noble Gases e. Alkaline Earth 5, which of the following best describes why 내 does not change significantly from top to bottom within a group? a. The number of protons in the nucleus does not change significantly c. There are more valence shells b. There are more completed electron shells d. There are fewer completed electron shells -. Give the family of elements in the periodic table that contains the least metallic elements. a. Halogens b. Pnictogens c·Cha!cogens d. Noble Gases e. Alkaline Earth _ . Determine the number of moles of C in 8221 g of carbon. a. 2.082 mol b. 2.623 mol c. 0.6851 mol d. 1.370 mol e.1.055 x 10 mol 8. Determine the mass in grams of 1.312 mol of Sc. b. 5.250 g a. 27.55 g c. 7.871g d. 0.3380 g e. 58.99 g 9. Write the electron configuration of a tin (Sn) atom (Z- 50). b. e. 1s 2s 2p 3s 3p

CHEM 1411 Test 3 Chapter 7-8 version B 25 questions. Each question: 4points; Total points: 100 Multiple Choices: Select one best answer. 1. What is the wavelength of a photon of red light (in nm) whose frequency is 4.55 x 10 H A) 152 nm B) 1.52×106 nm C) 659 nm D) 455 nm E) none of these 2. Green light can have a wavelength of 543 nm. The energy of a photon of this light is A) 1.08 x 10-31 J B) 5.43×10-7 C) 2.73 x 1018 J D) 5.52 x 10 J E) 3.66× 10-19J 3-What is the wavelength of light associated with the n-3 to n A) 3.97×10-25 nm B) 8.21 x 102 nm C) 9.75×106 cm D) 1.03 x 10-7 m E) 1.94 x 10m 1 electron transition? 4. Which of the following combinations of quantum numbers (, I, m, m.)is not allowed? A) 9, 8,-4, 1/2 B) 8, 2, 2, 1/2 C) 6, 5, -5, 1/2 E) All are allowed. 5. Which of the following could not be a valid mi quantum number for a 4d orbital? A) 2 B) 4 C) -2 D) 1 E) 0 6. The electron configuration for the carbon atom is: A) 1s222 B) [He]2s C) [Ne12s 2p E) none of these

Chem 126 Exam 2 March S, 201s Part A: 19 questions worth 76 points What is the equilibrium constant expression K, for the reaction M,Ol) ,0B) 2. Calculate k, for the reaction 4A(g) 3C(8)+ D(g) at 400 C if K, at 400°C for this reaction is 2.1x 10 a. 2.1 x 10 c. 0.70 d. 1.2 ALA e. 3.8 x 10* 3. Choose the correct option for the following reaction at equilibrium? CO(g)+ H,0(g)CO.(g)+ H2(g) a. [CO,J [H,] because they are in a 1:1 mole ratio in the balanced equation. b. The total concentration of reactants is equal to the total concentration of the products C. The total concentration of the reactants is greater than the total concentration of the products. d. The total concentration of the products is greater than the total concentration of the reactants, e. Impossible to tell without the value of Ke 1.25 moles of NOCl were placed in a 2.50 L reaction chamber at 427℃. After equilibrium was reached, 1.10 moles of NOCI remained. Calculate the equilibrium concentration of cl 4. 2" 2NOCI(g) 2 2NO(g) CI2(g) K 5.6 x 104 a. 0.44 M so b. 0.03 M c. 0.15 M S.o d. 0.06 M e. 0.075 M Consider the reaction A(g)+ B(g) z 2AB (g), Kp-3x 10%. 3.0 mol of A is introduced to a 3.0 L flask containing 2.0 mol of B. What is the concentration of AB at equilibrium? a. 0.667M b. 0.286M c. 1.67M d. 1.33M e. 0.80M