Physical and derived quantities, Chemistry

1. Discuss how such discoveries, technological advancement and breakthroughs were achieved and the person behind this advancement, it can be local or international.

2. List the major contributions to the field of chemistry made by each of the following:

a. Ancient Greeks
b. Aristotle
c. Carl Scheele
d. Egyptians
e. Robert Boyle
f. Stahl and Becher
g. Carl Scheele
h. Joseph Priestly
i. Antoine Lavoisier
j. John Dalton
k. Nineteenth-century chemists
 
3. Identification. Write the term described in each of the following:

a. It tells us the count of times the unit is contained in a given quantity.
b. The simplest forms of physical quantities.
c. The units used to describe derived quantities.
d. The system of units that used foots, pounds, and seconds as basic quantities.
e. The prefix added to the name of quantity to signify that the quantity is increased by 1 million.

4. Which of the following does not belong to the group? Encircle the letter of your choice.

a. a. length b. time c. area d. temperature
b. a. volume b. electric current c. density d. speed
c. a. meter b. ampere c. mole d. newton
d. a gram b. watt c. pascal d. square meter

5. Distinguish between the ff.:

a. Mass and weight
b. Calorie and joule
c. Calorie and kilocalorie
d. Celsius and Fahrenheit temperature scale
e. Density and specific gravity

6. Convert the following and express your answer in scientific notation:

1. 7.5 kilograms = 7.5 x 10______________ g
2. 3 microampere = 3 x 10______________ A
3. 4.6 milliseconds = 4.6 x 10______________ sec
4. 1.2 gigavolts = 1.2 x 10______________ V
5. 875 kg / m3 to g/ml
6. 1 g/ ml to lb / ft3
7. 24.8 lb to mg
8. 8.5 qt to ml
9. 525 ft/ min to cm /sec
10. -120oF to oK

10. Problem Solving:

a. The tallest living man today, as recorded, is Allam Chamna of Pakistan. He is 8 feet and 3 inches tall. What is his height in meter?
b. Light travels with a speed of 3 x 108 m/s. Express speed in km/hr.
c. A cube is 2 inches on one side. It weighs 25 g. Find its density in lb/ft3. Density = mass / volume.
d. A runner can run 100 meters in 10.5 sec. In how many seconds will he run 100 yards.
e. A mountain bike's wheel has diameter of 40 inches. In how many turns will the bike be able to cover 1 km?
f. What is the weight in kilograms of 1 ft3 if 1 cm3 of it weighs 0.30 g?
g. For each gas there is a temperature above which it is impossible to liquefy the gas no matter how high is the applied pressure. This is called the critical temperature. Helium has critical temperature of 5.3 0K. Find its equivalent in 0F.
h. During winter, the temperature in some parts of the United States may drop to 4 0C below. What is this temperature in 0 F?
i. Calculate the specific heat of exactly 150 cal of heat will raise the temperature of 18.5 g of a liquid from 22 to 44 oC.
j. Calculate the specific gravity of a substance with a density of 3.75 g/ ml.

Posted Date: 2/21/2013 3:02:29 AM | Location : United States







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