CHEM 133 Atoms, Mass,and Molecules Questions and Verified Answers | 2026 Update

Lesson 2 Quiz Question 1 (4 points) 88/100 How many silver atoms are contained in 3.75 moles of silver? Question 1 options: 1.61 × 1023 silver atoms 6.23 × 1024 silver atoms 6.50 × 1025 silver atoms 2.44 × 1026 silver atoms 2.26 × 1024 silver atoms Question 2 (4 points) What is the molecular mass of Br2? Question 2 options: 159.8 amu 79.90 amu 79.90 g 159.8 g 2.65 x 10-22 amu Question 3 (4 points) What is the mass of 4.50 x 1022 Cu atoms? Question 3 options: 7.47 x 10-2 amu 7.47 x 10-2 g 63.55 g 63.55 amu 4.75 g Question 4 (4 points) You have a sample of zinc (Zn) and a sample of aluminum (Al). You have an equal number of atoms in each sample. Which of the following statements concerning the masses of the samples is true? Question 4 options: The mass of the zinc sample is more than the mass of the aluminum sample, but it is not twice as great. The mass of the zinc sample is more than twice as great as the mass of the aluminum sample. The masses of each sample are equal. The mass of the aluminum sample is more than twice as great as the mass of the zinc sample. The mass of the aluminum sample is more than the mass of the zinc sample, but it is not twice as great. Question 5 (4 points) 1.00 mole of O2 contains the same number of molecules as Question 5 options: All of the choices 1.00 mole of CH3CO2H. 0.667 mole of O3. 2.00 mole of CH3CH2OH. Question 6 (4 points) What volume of 18 M sulfuric acid must be used to prepare 1.80 L of 0.215 M H2SO4? Question 6 options: 4.3 mL 7.0 mL 22 mL 2.2 x 103 mL 0.39 mL Question 7 (4 points) How many C atoms are in 5.50 g of C? Question 7 options: 5.01 x 1022 C atoms 6.02 x 1023 C atoms 3.31 x 1024 C atoms 2.76 x 1023 C atoms 5.50 x 1023 C atoms