Concept explainers
A Different civilization on a distant planet has developed a new temperature scale based on ethyl alcohol. The freezing point of ethyl alcohol
(a) draw a graph of the line using the data above.
(b) what is the slope of the line?
(c) what is the y-intercept of the line?
(d) Write an equation to convert °J to °C.
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Student Solutions Manual For Masterton/hurley's Chemistry: Principles And Reactions, 8th
- The thermostat shows that the room temperature is 21.7°C. Convert 21.7°C to Kelvin and Fahrenheit units. Be sure to answer all parts. (a) K (b) PFarrow_forward(a) Normally the human body can endure a temperatureof 105°F for only short periods of time without permanentdamage to the brain and other vital organs. What is thistemperature in degrees Celsius? (b) Ethylene glycol isa liquid organic compound that is used as an antifreezein car radiators. It freezes at −11.5°C. Calculate itsfreezing temperature in degrees Fahrenheit. (c) Thetemperature on the surface of the sun is about 6300°C.What is this temperature in degrees Fahrenheit?arrow_forwardExpressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. The Joule (J) is the SI unit of energy. The calorie (cal) is the amount of energy needed to raise the temperature of 1 g of water by 1°C, 1 cal = 4.184) The British Thermal Unit (BTU) is the amount of energy needed to raise the temperature of 1 pound of water by 1°F. 1 BTU - 1055J BTU 7.67 kJ 0.463 kcal 0.181arrow_forward
- 7. State whether each of the following represents a chemical change or merely a physical change:(a) A few grams of sucrose (table sugar) are placed in a small beaker of deionized water; the sugar crystals “disappear,” and the liquid in the beaker remains clear and colorless.(b) A copper statue, over time, turns green.(c) When a teaspoon of baking soda (sodium bicarbonate) is placed into a few ounces of vinegar (acetic acid), volumes of bubbles (effervescence) are produced.arrow_forwardA graduated cylinder (measuring cylinder) contains 27 mL of water at 25 °C and the mass of the water is 26.92 g. A sphere of iron with a diameter of 18.0 mm is added to the water in the graduated cylinder. The total mass of the water and the iron is 50.92 g. (The volume of a sphere is given by the expression: V = (4/3)ar³). (i) Calculate the total volume of the water and the iron in the graduated cylinder. (ii) Determine the density of iron at 25 °C? Show your calculations. (iii) Without doing any calculations, what do you think the density of 48.00 g of iron is at the same temperature? Explain your answer.arrow_forwardExpressing amounts of energy in different energy units is necessary to solve many chemistry problems. For practice, complete the following table. The Joule (J) is the SI unit of energy. 1 calorie (cal) = 4.184 J; 1 kcal = 1000 calarrow_forward
- (a) A cube of osmium metal 1.500 cm on a side has a mass of76.31 g at 25 °C. What is its density in g/cm3 at this temperature?(b) The density of titanium metal is 4.51g/cm3 at 25 °C.What mass of titanium displaces 125.0 mL of water at 25 °C? (c) The density of benzene at 15 °C is 0.8787 g/mL. Calculatethe mass of 0.1500 L of benzene at this temperature.arrow_forwardClassify each change as physical or chemical. (a) A balloon filled with hydrogen gas explodes upon contactwith a spark.(b) The liquid propane in a barbecue evaporates away becausesomeone left the valve open.(c) The liquid propane in a barbecue ignites upon contactwith a spark.(d) Copper metal turns green on exposure to air andwater.arrow_forwardA gas company in Massachusetts charges $1.70 for 15.0 ft3 of natural gas. (a) Convert this rate to dollars per liter of gas. (b) If it takes 0.304 ft3 of gas to boil a liter of water, starting at room temperature (25°C), how much would it cost to boil a 2.6−L kettle of water?arrow_forward
- After sitting on a shelf for a while, a can of soda at a room temperature (69°F) is placed inside a refrigerator and slowly cools. The temperature of the refrigerator is 37°F. Newton's Law of Cooling explains that the temperature of the can of soda will decrease proportionally to the difference between the temperature of the can of soda and the temperature of the refrigerator, as given by the formula below: T = Ta + (To – Ta)e¬kt the temperature surrounding the object To = the initial temperature of the object t = the time in minutes the temperature of the object after t minutes k = decay constant T The can of soda reaches the temperature of 54°F after 40 minutes. Using this information, find the value of k, to the nearest thousandth. Use the resulting equation to determine the Fahrenheit temperature of the can of soda, to the nearest degree, after 95 minutes. Enter only the final temperature into the input box.arrow_forwardThe molecular liquid chloroform (CHCl3) has a density of 1.48 g/mL, while the molecular liquid bromoform (CHBr3) has a density of 2.89 g/mL.(a) When 44.0 mL of CHCl3 and 39.2 mL of CHBr3 are mixed, a clear liquid solution forms. Is this a chemical or a physical change?arrow_forwardThe distance between two adjacent peaks on a wave is called the wavelength.(a) The wavelength of a beam of ultraviolet light is 247 nano-meters (nm). What is its wavelength in meters?(b) The wavelength of a beam of red light is 6760 pm. What is its wavelength in angstroms (Å)?arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningWorld of ChemistryChemistryISBN:9780618562763Author:Steven S. ZumdahlPublisher:Houghton Mifflin College Div