Name:_____

Apuntes

Name:________________________________ CHEM 200 PRACTICE EXAM 1 Name:________________________________ Part 1: Multiple choice No work required, record your answers on the scantron. Some questions can have multiple correct answers, fill in all correct answers! 1. Which of the following statements are true about a sample’s average kinetic energy? (select all that apply) a. It is directly proportional to the mass of the particles b. It is directly proportional to the temperature of the sample c. It is directly proportional to the wavelength of light emitted by the sample d. It is directly proportional to the velocity of the particles e. It is directly proportional to the volume occupied by the particles 2. How many cobalt atoms are in a 18.2 mole sample of pure cobalt? a. 3.02 x 1023 cobalt atoms b. 3.02 x 10-23 cobalt atoms c. 4.37 x 1027 cobalt atoms d. 1.10 x 1025 cobalt atoms 3. What is the mass of 7.27 moles of pure chlorine gas? a. 515 grams b. 0.205 grams c. 0.103 grams d. 258 grams 4. Which of the following elements would have the most metallic character? a. Nitrogen b. Phosphorus c. Arsenic d. Antimony e. Bismuth 5. After combustion analysis, a sample is found to have an empir...