Description - First, formulate your hypothesis: What do you think the reactions will be between the different kinds of candies when they are placed into the different kinds of soda? Record your predictions. Remember to record a hypothesis for each separate type of candy, combined with each different type of soda. - Next, collect all the necessary items for the lab: Mentos candies Another type of candy Meter stick Magnifier Test tube - Then, carry out the experiment. Place each different type of candy into each different kind of soda and record the reaction that takes place. - Finally, you are going to compare the predictions you made in your hypothesis to the results you got when you conducted your experiment. Did the experiment go like you planned? If not, why do you think the results were different from your predictions? Why do you think the experiment turned out the way it did? Were there any additional factors that might have influenced the results of the experiment? If you did the experiment again is there anything you would have done differently? - Complete a lab report to turn in to report your findings. lab report will be made up of four sections. Each section will be between two and five paragraphs. These should be labelled with individual headers: Question and Hypothesis, Experimental Process, Summary, and Analysis. The Analysis section should discuss what your your results mean, and this is the most important part of your experiment. - This paper must be written in APA style, in at least 500 words with strong descriptive details.
Description Question 1 The specific heats of Lead and Gold are both is 0.128 J/g°C. Which of the following statements is not true? Select one: a. When 10.0 g of lead is heated from 25°C to 35°C, it gains128 J of heat b. When 10.0 g of gold is heated from 25°C to 35°C, it gains128 J of heat c. Gold and Lead have the same molar heat capacity d. None of the statements are false e. Lead has the higher molar heat capacity Question 2 Calculate ?H for the reaction 4 NH3 (g) + 5 O2 (g) ?4 NO (g) + 6 H2O (g), from the following data: N2 (g) + O2 (g) ?2 NO (g) ?H = -181 kJ N2 (g) + 3 H2 (g) ?2 NH3 (g) ?H = -92.0 kJ 2H2(g) +O2(g) ?2H2O(g) ?H = -484 kJ Question 3 The combustion of propane produces heat according to the equation: C3H8(g) + 5O2(g) ? 3CO2(g) + 4H2O(g) ?H° = is –2044 kJ How much heat will be evolved if 2.20g of propane is combusted? Question 4 A 20.0 g piece of a metal with specific heat of 0.900 J/g.0C at 98.0 0C dropped into 50.0 g water in a calorimeter at 20.0 0C. The specific heat of water is 4.18 J/g.0C Calculate the final equilibrium temperature of the mixture Question 5 A gas heated and it absorbs 100 kJ of heat. It expand doing 25 kJ of work. What is the internal energy change of the gas? Question 6 Calculate the standard enthalpy of formation of propane, C3H8(g), given that ?H°f[CO2(g)] = –394 kJ/mol and ?H°f[H2O(l)] = –242 kJ/mol, and the following thermochemical equation C3H8(g) + 5O2(g) ? 3CO2(g) + 4H2O(g) ?H° = is –2044 kJ Question 7 Given that the molecular formula of sand is SiO2 and that its specific heat is 0.84 J/g°C, its molar heat capacity is Question 8 Calculate the standard enthalpy change for the following reaction given that the ?Hf° of benzene, C6H6(l) is 49 kJ/mol, the ?H°f of CO2(g) = –394 kJ/mol and ?H°f of H2O(g) = –242 kJ/mol: 2C6H6(l) + 15O2(g) ? 12CO2(g) + 6H2O(g) ?H° = ? Question 9 The standard enthalpy of formation, ?Hf°, of which of the following is zero at room temperature (298K)? Select one: a. All of the above b. CO2(g) c. Br2(g) d. H2O(l) e. Br2(l) Question 10 A 47.3 g sample of an alloy was heated to 90.00 oC and then dropped into a beaker containing 90.0 g of water at a temperature of 25.00 oC. The temperature of the water rose to a final temperature of 28.00 oC. The specific heat of water is 4.184 J/goC. What is the specific heat capacity of the alloy?
Description First, formulate your hypothesis (Scientists pride themselves on being able to prove themselves wrong. So don’t worry if your hypothesis turns out to be incorrect!) What do you think the reactions will be between the different kinds of candies when they are placed into the different kinds of soda? Record your predictions. Remember to record a hypothesis for each separate type of candy, combined with each different type of soda. Next, collect all the necessary items for the lab. You may already have these things around your home, or you should be able to get them easily at any store. You will need: Mentos candies Another type of candy Meter stick Magnifier Test tube Then, carry out the experiment. Make sure you are wearing your safety equipment, and that you are carrying out the experiment in a box or aquarium that will prevent a mess. Place each different type of candy into each different kind of soda and record the reaction that takes place. Be careful, because this may or may not cause a violent chemical reaction that could result in an overflow of soda. Finally, you are going to compare the predictions you made in your hypothesis to the results you got when you conducted your experiment. Did the experiment go like you planned? If not, why do you think the results were different from your predictions? Why do you think the experiment turned out the way it did? Were there any additional factors that might have influenced the results of the experiment? If you did the experiment again is there anything you would have done differently? You will complete a lab report to turn in to report your findings. If you need a review on how to prepare a lab report, return to your Unit 1 Project for guidance. Final Product: Lab report Your lab report will be made up of four sections. Each section will be between two and five paragraphs. These should be labelled with individual headers: Question and Hypothesis, Experimental Process, Summary, and Analysis. You will be graded on each section individually. You will be assessed on understanding of the scientific process, the content of your experiment, and the thoughtful development of your ideas. Notice that the Analysis section is weighted heavier than the others - the Analysis section should discuss what your your results mean, and this is the most important part of your experiment. 15% of your grade will be on grammar, mechanics, and polish. This will include spelling, punctuation, sentence structure, clarity of writing, and organization for ease of reading. An introduction describing your question and initial hypothesis (20%) A description of your experimental process (20%) A summary of your results (20%) An analysis of your results (25%)
Description Using to represent a neutron and to represent an electron, complete the following nuclear equations: 1. 2. "Please provide an explanation for the your choices to complete each reaction."
Description Question 1 A fixed amount of gas occupies a volume of 7.25 L at a pressure of 4.52 atm. What will be the volume occupied if the pressure is decreased to 1.21 atm at constant temperature? Question 2 Calculate the density of Cl2 at 27 oC and 600 torr. Question 3 N2 effuses 2.16 times faster than an unknown gas. What is the molar mass of the unknown gas? Question 4 Which of the following occupies the largest volume at STP? Select one: a. 1.00 g H2 b. All of them occupy the same volume c. 1.00 g N2 d. 1.00 g He e. 1.00 g Ne Question 5 Find the pressure of 10.0 g of Argon gas in 750 mL container at a temperature of 50 oC? Question 6 A gas occupies 3.00 L at 24oC. To what temperature should it be cooled at constant pressure to occupy 2.80 L? Question 7 Consider the reaction: CO(g) + 2H2(g) ?CH3OH(l) What is the volume of H2 is required to make 20.0 g of CH3OH at 25oC and 710 mmHg? Question 8 A gas occupies a volume of 88.2 mL at 35oC. What will be the volume occupied if it is heated at constant pressure to 155oC? Question 9 What will be the volume occupied by 10.0 g of CO2 at 505 mm Hg and 57 oC? Question 10 Which of the following has the largest density at STP? Select one: a. Ne b. He c. All have the same density d. H2 Question 11 Which of the following gases will have the highest rms velocity? Select one: a. He at 298 K b. H2 at 398 K c. H2 at 298 K d. He at 398 K Question 12 Calculate the total pressure in a 10.0 L tank containing 24.0 g He and 4.00 g O2 at 27 oC. Question 13 Which of the following occupies the largest volume at STP? Select one: a. All occupy the same volume b. 1.00 mol Ne c. 1.00 mol Ar d. 1.00 mol He Question 14 0.563 g of an unknown gas occupies 225 mL at 57 oC and 886 torr. Calculate the molar mass of the gas. Question 15 If a sample of gas occupies a volume of 10.0 L at STP, what will be the volume occupied when the temperature is changed to 47 oC and the pressure to 660 torr? Question 16 A mixture of gases contains also Oxygen. If the mole fraction of Oxygen in the mixture is 0.15 and its partial pressure is 0.20 atm, what is total pressure of the gas mixture? Question 17 The pressure at the summit of Mt. Everest is about 236 torr. What is this pressure in atm? (760 torr = 1 atm) Question 18 Consider the reaction: 2CH4(g) + 5O2(g) + 2NO(g) --> 2CO2(g) + 4H2O(g) + 2NO2(g) At constant temperature and pressure if 10.0 L of O2 is used, what volume of CO2 will be formed? Question 19 A 1.00 L mixture of He , Ne, and Ar has a total pressure of 662 mmHg at 25oC. If the partial pressure of Ar is 209 mm Hg and the partial pressure of Ne is 112 mmHg, calculate the partial pressure of He in the mixture and the mass of He contained in the mixture. Question 20 A 5.00 L sample of O2 gas contains 0.150 moles of O2. What mass of O2 is required to occupy 7.50 L?
Description Answer the question below. Use your own words, and write in complete sentences. Carbon dioxide and water react to form bicarbonate ion and hydronium ion. Hyperventilation (rapid breathing) causes more carbon dioxide to be exhaled than normal. How will hyperventilation affect the pH of blood? Explain
