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- A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 74.3 ºC. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 ºC. What is her percent error?nHMAC%3Def41415d9158412623399163083b2ede#10001 Spr. 2021 8 Gu HI, Leira v Sign Out Item 4 I Review | Constants | Periodic Table Alexandra decides to climb Mt. Krumpett, which is 5000 m high. She determines that this will require a total of 2250 kcal of energy for the trip. For her food supply, she decides to take nutrition bars. The label states that each bar contains 50 g of carbohydrates, 10 g of fat, and 40 g of protein. Part A How many nutrition bars should Alexandra pack? Express the number of bars numerically. > View Available Hint(s) ν ΑΣφ bars Submit Previous Answers 0V 12:33What is the difference between a homogeneous and a het-erogeneous mixture?
- Which of the following describe physical properties and which describe chemical properties of methane( principal component of gas) 1.) Methane is lighter (less dense) than air 2.)Methane has a higher fuel value(energy produced per gram) than any other fossil fuel 3.)Methane can be liquified for transport by shop if it cooled to 109K 4.)Liquified methane is over 300 times denser than methane gas at is boiling point 5.)Leaking natural gas has caused that explosions that destroyed people homes 6.)Methane is colorless and odorless2. Two students weigh a gelatin capsule (0.112g). Next they add pieces of aluminum-zinc alloy to the capsule and weigh the capsule and alloy (0.271g). They weigh out an empty beaker (141.209) and begin the experiment. After the reaction, they determine the mass of the beaker (with displaced water) to be 307.712g. The temperature of the water was 21 degrees Celsius and the barometric pressure was 745.9 mmHg. Fill the calculation section of the table on the following page.In an experiment, a student was asked to measure the densities of liquid acetone and metallic chromium. He was given a pycnometer which weighed 26.880 g empty. When filled with water and stoppered, the mass was recorded as 54.992g at 28C. The pycnometer was cleaned and filled with acetone. The mass was 49.137 g. Again, the flask was cleaned and dried. Into it were added some chunks of chromium and the total was found to weight 78.666 g. Leaving the chromium in the pycnometer, it was then filled with acetone. The flask, metal and acetone were found to weigh 95.199 g. From this data, calculate the density of acetone and the density of chromium (show all your calculations).
- 10 11 12 13 14 15 16 17 18 19 The particles in a gas vibrate faster than the particles in a liquid. O True O False 5.* Intranet - CSUM 101 Chem101 O Post Attendee - Zoom b My Questions | bartleby A app.101edu.co Bders Question 4 of 5 Submit advuuned wo,wth yor ameo e Leturelow in 20min teratof it If molecules of hydrogen, nitrogen, oxygen and chlorine have the same kinetic energy which molecule will be moving the fastest? A) hydrogen B) nitrogen C) охудen D) chlorine E) All molecules will have the same speed. 8:13 AM O Type here to search 11 10/20/2020 ...What is the median of the values 7.79, 8.24, 5.81, 4.97, 1.04, 7.39, and 7.22?