Module 1 Chapter 1 (5 questions)

By Joan Holmes,2014-05-06 05:32
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Module 1 Chapter 1 (5 questions)

    Preston University

Chemistry (CH 1010)

    Module 1 Chapter 1 (5 questions) 24. Which of the following are exact numbers?

    A. There are 100 cm in 1 m.

    B. One meter equals 1.094 yards.

    C. We can use the equation F = (9/5)C + 32 to convert from Celsius to Fahrenheit temperature.

    Are the numbers (9/5) and 32 exact or inexact?

    D. = 3.1415927

a. exact

    b. inexact; 0.9144 m/yd is exact (see Exercise 1.23c) Thus, there are 1/0.9144= 1.093613 ...yd/m.

    c. exact

    d. inexact (it has an infinite number of decimal places.)

34. a. How many kilograms are in one teragram? 2b. How many nanometers are in 6.50 X 10 terameters?

    c. How many kilograms are in 25 femtograms?

    d. How many liters are in 8.0 cubic decimeters?

    e. How many microliters are in one milliliter?

    f. How many picograms are in one microgram?

    52. A thermometer gives a reading of 96.1 F + 0.2F What is the temperature in C? What is the uncertainty?

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     3 at 20C. If 5.25 of pure silver pellets is added to a graduated 60.The density of pure silver is 10.5 g/cm

    cylinder containing 11.2 mL of water, to what volume level will the in the cylinder rise?

    64. What is the difference between homogeneous and heterogeneous matter? Classify each of the

    following as homogeneous or heterogeneous.

    a. soil

    b. the atmosphere

    c. a carbonated soft drink