Chapter 1, Problem 1.63E

1. A chef heated a bowl of soup of 30 °C to 50°C. what is the change in temperature in the Fahrenheit scale?

QUESTIONS REFER to your notes to answer Questions below: 1. Convert 25.0 °C (Room Temperature) in Celsius to: • Fahrenheit • Kelvin . Make sure you report to proper number sig figs using multiple operations rules. 2. Which temperature scale do we use in the laboratory? 3. Why do not use the degree (o) mark on the unit kelvin (K)? 4. Explain why you would be dead at 100 kelvin (K). Refer to figure above.

of someone with a fever, 39.2° b. a cold wintery day, -25°C c. the lowest possible temperature, -273°C d. the melting-point temperature of sodium chloride, 801°C 48. Convert the following Kelvin temperatures to Celsius and Fahrenheit degrees. a. the temperature that registers the same value on both the Fahrenheit and Celsius scales, 233 K b. the boiling point of helium, 4 K c. the temperature at which many chemical quantities are determined, 298 K d. the melting point of tungsten, 3680 K 49. At what temperature is the temperature in degrees Fahrenheit equal to twice the temperature in degrees Celsius? 50. The average daytime temperatures on the earth and Jupiter are 72°F and 313 K, respectively. Calculate the difference in tem-

Chemistry A student performed the same experiment as you. The following data was recorded in their lab notebook. Mass of Mg, g Final buret volume, mL Pbarometric, in Hg PH2O, torr T, °C 0.035 41.86 27.02 17.5 20.0 Calculate the student's experimental value of R. Round your answer to four places after the decimal.

Home work and Exercises 1.53 and 1.56 53. Convert the following Fahrenheit temperatures to the Celsius and Kelvin scales. a. -459°F, an extremely low temperature b. -40.°F, the answer to a trivia question c. 68 F, room temperature d. 7 x 10 F. temperature required to initiate fusion reactions in the sun

34. Convert 4.58 x 10³ cm³ to each unit. a. L b. mL c. gal d. qt The m in the equation for density is in italic type, meaning that it stands for mass rather than for meters. In general, the symbols for units such as meters (m), seconds (s), or kelvins (K) appear in regular type, while those for variables such as mass (m), volume (V), and time (t) appear in italics.

16. A mixture is made by adding 20.42 g of substance A, 1.322 g of substance B, and 83.1 g of substance C. Calculate the total mass of the mixture with the proper number of significant figures. 17. The average speed of a nitrogen molecule in air at 25 °C is 515 m/s. Convert this speed to miles per hour.

Write the following data in scientific notation.a. The diameter of the Sun is 1,392,000 km.b. The density of the Sun’s lower atmosphere is 0.000000028 g/c m 3.

5. Complete the following conversions: a. 1 kg = g b. 1,000 cL = %3D kL c. 250 ms =