Recitation Worksheet Two

Recitation Worksheet Two Name: Key UGA ID: Instructions: Please enter your first and last name as it appears on the eLC roster (do not use a nickname that is not reflected in eLC). Your UGA myID is a combination of letters and numbers (example: mine is jmj81738). Do not enter your 81x number. Download this worksheet and print it if you have a printer. Write the answers in the answer boxes and show your work when appropriate. Using the instructions in the Welcome module on eLC, convert your worksheet to a PDF and then upload it to Gradescope. If you have an iPhone or Android device, you can scan and upload directly through the Gradescope app. The pages must be in the correct order or Gradescope will not be able to read it. If you do not have a printer, download the worksheet and type your answers in the answer boxes and upload it to Gradescope. Write your work on separate sheets of paper, convert these pages to a PDF using the instructions in the Welcome module on eLC, then upload them to the dropbox on eLC for this worksheet. If you are using an app to annotate the worksheet, make sure the pages are in the correct order and have the same layout as the original or Gradescope will not be able to read it. Answers must be written in the corresponding answer box or no credit will be awarded. This worksheet is due no later than 11:59 PM on the Friday of the recitation week. The instructions for uploading worksheets to Gradescope can be found in the Content area of eLC in the Welcome Module. You must show your work to receive credit. A periodic table and formula sheet are attached to the end of this worksheet. Please keep these attached to your worksheet in the correct order when submitting to Gradescope. 1. The state of matter for an object that has a definite volume but not a definite shape is B gas cari change shape & volume to →ga fit its container A. Gas B Liquid C. Solid D. Plasma 313.2°F 2. If the melting point of indium is 156.2 °C, what will be the physical state of indium at 323 °F? B A. Indium would be gaseous at 323 °F (B) Indium would be liquid at 323 °F C. Indium would be solid at 323 °F = 5 (°F-32) *Convert to °F first 3. Which of the following are intensive properties? Select all that apply and answer using capital letters with no spaces (e.g. ABCDE). ADEF A. boiling point B. mass C. volume color E density Ftemperature *an intensive property does not depend on the amount of sample present 4. Which of the following are extensive properties? Select all that apply and answer using capital letters with no spaces (e.g. ABCDE). BC A. boiling point B. mass volume D. color E. density F. temperature 5. The statements below describe some physical and chemical properties of sucrose (table sugar). Choose the chemical properties. Select all that apply and answer using capital letters with no spaces (e.g. ABCDE)., a chemical property, becomes evident after a chemical ren BD A. It is a colorless solid. BIt chars or blackens when heated gently. C. Its density is 1.6 g/mL.. It ignites and burns with a yellow flame when heated strongly. E. It is usually in the form of small crystals although it can occur as a powder. 6. Determine whether the following are (A) pure substances or (B) mixtures. You only need to write the corresponding letter ("A" or "B") in the boxes below. (a) potato salad B (d) carbon monoxide gas A (b) gasoline B (e) iron rod A (c) liquid mercury A (f) slightly rusted iron bar B 7. Determine whether the following are (A) homogeneous mixtures, (B) heterogeneous mixtures, (C) elements, or (D) compounds. You only need to write the corresponding letter ("A", "B", "C", or "D") in the boxes below. (a) potato salad B (d) carbon monoxide gas D (b) gasoline A (e) iron rod C (c) liquid mercury C (f) slightly rusted iron rod B C12 8. Which of the following best describe chlorine gas? Select all that apply and answer using capital letters with no spaces (e.g. ABCDE). ACEF AIt is a pure substance B. It is a mixture It is an element D. It is monatomic It is diatomic FIt is a molecule G. It is a compound Chlorine is one of the diatomic elements you should memorize CI-CI 9. From the chemical decomposition of an unknown solid, one obtains a gas and a new solid, both of which are pure substances. From just this information it can be said, without a doubt, that: D A. one of the products is an element B. neither product is an element C. both products are elements the original solid is not an element E. the original solid is a mixture 10. A student goes to the lab and dissolves a solid sample in a beaker of water. Not long after, they realize they needed that solid for another experiment. What method would be best in separating the mixture and ultimately isolating the solid? C * if not dissolved, filtration would be better A. Filtration B. Chromatography Distillation Separation utilizing differences in boiling points D. A combination of filtration and chromatography E. None of the above 11. The fact that all samples of the compound calcium carbonate are made up of approximately 40% calcium, 12% carbon, and 48% oxygen is an illustration of the Law of: A *no matter how much Calcium Carbonate you have the compositions of each element will remain constant A. Constant Composition (or Definite Proportions) B. Conservation of Matter (or Mass) C. the Jungle D. Multiple Proportions E. Transmutation