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Biurebb

In: Business and Management

Submitted By fady
Words 662
Pages 3
Chapter 1 Practice Worksheet:
Matter and Measurement

1) What are the vertical columns in the periodic table called? _families or groups_______________

2) What are the horizontal rows in the periodic table called? __periods______________

3) Name the following groups and list three elements (with symbols) in each one: Group Name Elements and symbols Group 1A _Alkali metals______________ _Na, K, Rb_______ Group 2A _Alkaline Earth metals_______ _Mg, Ca, Sr______ Group 7A _Halogens_________________ _F, Cl, Br________ Group 8A _Noble Gases_______________ _Ar, Kr, Ne______

4) Use metric prefixes to calculate the following conversions: a. 156 cm = __1.56_______________ m b. 4.870 km = _4.870 x 105___________ cm c. 7809 mL = __7.809 x 10-6_________ ML d. 98.412 GL = _9.8412 x 1012________ cL e. 1234 μm = _1.234 x 10-3___________ m f. 675 nm = _6.75 x 10-7_____________ m g. 0.00549 kg = _5.49 x 103___________ mg

5) How many significant figures are in each of the following measurements? a. 0.002960 g __4____ b. 1000.00 g __6____ c. 100,000 g __unknown____ d. 1.000 x 102 g __4____ e. 1.20980 g __6____

6) Write the result of each calculation. Remember to include units and the correct number of significant figures. a. (200.5 m + 2.59 m) x 60.7 m = 1.23 x 104 m2

b. (3.3 x 10-4 g) ÷ (9.9 x 10-5 mL) = 3.3 g/mL

c. (1.0 x 105 s) x (15.0 m/s) = 1.5 x 106 m

d. (25.8 g) ÷ (2.00 g/mL) = 12.9 mL

e. 153.6789 g – 42.3409 g = 111.3380 g

7) Temperature Conversions: a. Room temperature is about 25 oC. What is this temperature in units of Kelvin?

298 K

b. The temperature at which carbon dioxide sublimes is about 195 K. What is this temperature in units of degrees Celsius?

-78 oC…...

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