Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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1.Neon, a gaseous element used in neon signs, has a melting point of -248.6 °C and a boiling point of of -2461.1 °C. Express this temperature in kelvin.
2.A 2-in piece of chocolate cake with frosting provides 1670kJ of energy. What is this in dietary Calories?
Metric Units Worksheet
Meiric Units
Piaur pane hr curer deer an dhe rriar Asr
Meler
a Metric unit used lo measure the temperature of an object
I
2.
Liter
b. Metric unit used to measure the amount of time
3.
degree Cekius
c. Metric unit used to measure the length of an object or distance
4.
Sccond
d. Metric unit used to measure the amorunt of maller in an object
5.
Gram
e. Metric unit used lo measure the space an object takes up
Which Units Would A Scientist Use?
Pleaar idih ar baar wi ed vheevarey he Akreg ivos by seriig riv fllonriy ri abberviatior vea
m=Meier
L=Liter
C=depree Cebius
s= Second
2= Gram
Vulcanists measure the height of an ash cloud from the Mt. Saint Helens volcano.
CSl investigalors measure the core temperature ofa corpse found in a dumpster.
Mammakogists measune the time a cheelah runs a distance of l mile.
Gemologists measure the mass of a diamond found in a South African mine.
5.
Doctors measure the amount of fid trapped between the brain and the skull bune.…
1. Classify each of the following as a chemical or physical change.
a. burning of wood
b. browning of apple slices
c. making ice cubes
d. making ammonia from nitrogen and hydrogen
e. rusting of iron
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- 7. What number should be reported to best reflect the temperature according to the thermometer? A. 21.7 °C B. 21.70 °C CC 22°C ........ 25 20 15 D. 21 °C 22.7°C E. undergo thearrow_forwardA hot tub is filled with 570 gal of watera. What is the volume of water, in liters, in the tub?b. What is the mass, in kilograms, of water in the tub?c. How many kilocalories are needed to heat the water from 62 °F to 105 °F?d. If the hot-tub heater provides 5900 kJ/min, how long, in minutes, will it take to heat the water in the hot tub from 62 °F to 105 °F?arrow_forwardof 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-arrow_forward
- Which is a correct statement about heat and temperature? A. O Heat and temperature are both forms of energy. B. O 100g of water at 20 °C contains the same amount of energy as 200 g of water at 20 °C. C. O Heat and temperature are both a measure of the kinetic energy of the particles. D. O When 1.0 kg of water cools from 27 °C to 26 °C it gives out 4.2 kJ of heat. Which statements are correct about temperature? I. A rise in temperature of 1.0 °C is the same as a rise in temperațure of 1.0 K. II. Both the degrees Celsius scale and the Kelvin scale are based on the temperature at which pure water melts and boils. III. Pure water boils at 100 °C and 373 K at 100 kPa (1 atmosphere) pressure. A. O Il and III В. I and II only С. О I, Il and III D. O I and II onlyarrow_forwardWrite equation that states the relationship between the given units, and then write the conversion factor(s) that coul be used to convert the first unit to the second. (Example: Milli. meters and meters are related by the equation 1000 mm 1m The conversion factor 1 m/1000 mm should be used.) a. grams and micrograms d. liters and milliliters b. nanometers and meters e. megahertz and hertz c. kilograms and gramsarrow_forwarda. b. A student records the following data in the laboratory when determining the percentage of water in an unknown hydrate. Mass of container Mass of container and hydrate Mass of container and contents after: Pirst heating 47.952 % 49.837 % 49.500 % Second heating Third heating What is the percentage of water in this student's unknown? Based on the values obtained in the three heating's above, do you think the student should have confidence in his results? Why? What do you think he should do to be more confident in his result? 48.918 g 48.811 garrow_forward
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