CHM 1100 What Was Marie Curies Hypothesis Discussion Questions

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CHM 1100 What Was Marie Curies Hypothesis Discussion Questions

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  1. Marie Curie was a Polish scientist that specialized in chemistry and physics. She wanted to understand how X-rays worked and noticed in her studies that the element, Uranium, gave off rays that could be measured but did not know what the rays were. She assumed that the rays came from the uranium itself instead of through different molecules interacting with each other. To study the rays, she used an instrument, called an electrometer, that studied the electricity that the rays passed through the air. Through this she was able to discover that the more uranium atoms there were in a compound, the stronger the rays that came off of it. She used this discovery to test other minerals that emitted more rays than Uranium, and discovered the elements Thorium, Polonium and Radium. Through her discoveries of these elements, scientists were able to find the structure of the atom and even how the rays can be used to fight cancer. What was Marie Curie’s observation?
  2. Question 2What was Marie Curie’s hypothesis?
  3. Question 3What was Marie Curie’s experiment to prove her hypothesis?
  4. Question 4
  5. What was the law Marie Curie discovered through her experiment?
  6. Question 5What theories were formed from the law of Marie Curie’s experiments?
  7. Question 6Lina has worked hard to gather data for her experiments. With her last set of data she received, she is ready to publish her paper in a peer-reviewed journal. In order to do that, she has to make sure that all of her data has consistent SI units, significant figures and in scientific notation if necessary. Help Jessica get all of her data in order. How many significant figures are in 43.8lbs?
  8. Question 71 PointAdd 43.8lbs and 56.8923lbs. What is the answer in the correct significant figures?
  9. Question 81 PointConvert the answer from #7 to kg. Use the correct significant figures.
  10. Question 91 PointConvert the answer from #8 in kg to g. Use the correct significant figures.
  11. Question 101 PointWrite the answer from #9 in scientific notation. Use the correct significant figures.
  12. Question 11How many significant figures are in 643.78 quarts?
  13. Question 12Multiply 643.78 quarts by 4.3562. What is the answer in the correct significant figures?
  14. Question 131 PointConvert the answer in #12 to mL. Use the correct significant figures.
  15. Question 14Write the answer from #13 in scientific notation. Use the correct significant figures.
  16. Question 15Find the correct mass and the volume calculated from #10 to #13 to calculate the density. Density = (4.7033 x 104 g/ 2.6540 x 106 mL) =
  17. Question 161 PointThe American Heart Association recommends to eat no more than 2,301mg of sodium per day. Convert the mass of sodium to ounces, if 1 oz = 28.3459g. Use correct significant figures. 2301mg x (0.001g / 1 mg) x (1 oz/ 28.3459g) =
  18. Question 171 PointWhat is the difference between a heterogenous and a homogenous mixture?
  19. Question 181 PointDescribe the difference between a solid, liquid or a gas in terms of the molecules in a container, within each state of matter.
  20. Question 19Give an example of a chemical change that occurs in your life, regularly.
  21. Question 20With the rest of her data, Lina needs to make sure her numbers are in scientific notation so that they are consistent to each other and easy to understand. For the following, write each answer in scientific notation with the correct significant figures. 4.0 x 65.89 kg / 5 =
  22. Question 211 PointKamal is a nurse that works in the ER. He knows the first thing he has to do is take the body temperature of each patient. He has learned from his studies that the normal body temperature is 37?C. If the body temperature is higher than 37?C, the patient has a fever, and if the body temperature is below 37?C, the patient has hypothermia. Help Kamal figure out if his patient is okay.
    Patient #2: Kamal read a body temperature of 312.15?K. Convert K to C and write whether the patient is normal, has a fever or has hypothermia. Use correct significant figures.
  23. Question 221 PointLina is working through her homework assignment and is having trouble with working through some density equations. Help Lina with her homework. Use correct significant figures and make sure the units are correct. What is the density of a piece of ice if it has a mass of 4.32g and a 3.5 cm on 3 sides?
  24. Question 231 PointLina is working through her homework assignment and is having trouble with working through some density equations. Help Lina with her homework. Use correct significant figures and make sure the units are correct. What is the mass of mercury if it has a volume of 9.12 cm3 and a density of 13.593 g/mL?
  25. Question 241 PointDr. Henrietta Owusu was invited to give a presentation of her work at a medical conference. Her presentation encompassed explaining various properties of matter. At the presentation, she received a question to give examples to identify various intensive and extensive properties of matter. Help her identify the following properties below as intensive or extensive. Heat.
    1. Neither
    2. Intensive
    3. Extensive
    4. Both
  26. Question 251 PointDr. Henrietta Owusu was invited to give a presentation of her work at a medical conference. Her presentation encompassed explaining various properties of matter. At the presentation, she received a question to give examples to identify various intensive and extensive properties of matter. Help her identify the following properties below as intensive or extensive. Temperature.
    1. Neither
    2. Intensive
    3. Extensive
    4. Both
  27. Question 261 PointAbayomi has several beakers of different mixtures and needs to figure out how to identify each of them. Help him identify if the mixtures in each beaker is heterogenous or homogenous: Beaker #5 has cereal with milk.
    1. Neither
    2. Homogenous
    3. Heterogenous
    4. Both
  28. Question 271 PointAbayomi has several beakers of different mixtures and needs to figure out how to identify each of them. Help him identify if the mixtures in each beaker is heterogenous or homogenous: Beaker #3 has pomegranate juice with seeds.
    1. Neither
    2. Homogenous
    3. Heterogenous
    4. Both
  29. Question 281 PointDr. Henrietta Owusu received a second question asking if she could provide examples differentiating the physical and chemical properties of matter. Help her identify if the following changes are a chemical change or a physical change. Ice melting.
    1. Neither
    2. Physical change
    3. Chemical change
    4. Both
  30. Question 291 PointDr. Henrietta Owusu received a second question asking if she could provide examples differentiating the physical and chemical properties of matter. Help her identify if the following changes are a chemical change or a physical change. Mixing chocolate syrup with milk.
    1. Neither
    2. Physical change
    3. Chemical change
    4. Both
  31. Question 301 PointOberon took up archery recently and is trying his hardest to be both precise and accurate with his shots. In his latest practice round, he shot at 4 different targets. Identify if his shots in the target are accurate, precise, both accurate and precise, or neither.image00260bf8b30.jpg
    1. Both accurate and precise
    2. Precise, but not accurate.
    3. Accurate, but not precise.
    4. Neither accurate nor precise.

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