Worksheet_SigFigs_SciNota_DimAnaly_Density

Worksheet_SigFigs_SciNota_DimAnaly_Density - Determine how...

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Unformatted text preview: Determine how my WM~Sigxfificammm figmesareineachofthesenumbers (568187aren‘ickyll). 1) 2.03 _ 16) 0.0224 31) 0.00471 46) 10.05 61) 5000000 2) 1.0 _ 17) 3.000 32) 0.0069 47) 0.1005 62) 0.000100 3) 2.00 13) 3000 33) 230513 43) 0.002000 63) 1.005 4) 0.00360 19) 0.004300 34) 1000.1 49) 23000000 64) 2.0550 5) 1.0030 20) 0.00300 35) 0.006007 50) 6.250 65) 0.0050 6) 967,000 21) 0.00967 36) 9.6700 51) 9.067 66) 30.4 7) 5.10 22) 0.023 37) 7.0200 52) 0.04010 67) 54.000 3) 0.000065 23) 4530 33) 70,164 53) 3.00 63)90 9) 0.009 24) 0.90 39) 0.090 54) 909 60) 900.0 10) 0.005 25) 500 40) 0.00005 55)0.500 70) 0.050 11) 0.005670 26) 0.1110 41) 0.0076009 56) 670,000. 71) 5000 12) 0.00372 27) 54,000 42) 0.000003 57) 0.300003 72) 500,000,000 13) 730 23) 703 43) 0.903 53) 0.00331 73) 24,091,300 14) 73.000 29) 730.00 44) 0.4900 59) 34.302 74) 0.00600 15) 730.000 30) 730.0 45) 670,004 60) 2,700 75) 20.040 Determine how many significant figures are in each of these numbers. 76) 7.030 x 10*? 30) 4.0 x 1074 34) 500 x 1015 77) 000450111019 31) 1030111012 35) 23.00011 1010 73) 3.40 x 10'3 32) 0.03400 )1 1015 36) 0023.00 x 1012 79) 5.00011 106 33) 2.301 x 1015 37) 400. x 105 Problems 1 to 75 are reproduced just below and renumbered. Underline each zero. and only zeros,‘ in each number that 33) 2.03 " 39) 1.0 90) am 91) 0.00360 92) 1m30 93) 967.000 94) 5.10 95) 0.000065 96) 0.009 ' 97) 0.005 98) 0.005670 99) 0.00372 100) 730 101) 73,000 102) 730.000 you believe should be 31 103) 0.0224 118) 0.00471 104) 3.1110 119) 0.0009 1033000 120) 230513 100) 0.004300 121) 11110.1 107) 0.00800 122) 0.0061117 108) 0.00967 123) 9.6700 109) 0.023 124) 7.0200 110) 4.530 125) 70,164 1 1 1) 0.90 126) 0.090 112) 500 127) 0.00005 113) 0.1110 128) 0.0076009 114) 54,000 129) 011311108 115) 708 13)) 0.908 116) 730.00 131) 0.4900 117) 780.0 132) 670.0114 133) 10.05 134) 0.1005 135) 0.002030 13023000000 137) 6.250 133) 9.067 139) 0.04010 140) 3.00 141) 909 142) 0.5@ 143) 670.000. 144) 0.8111008 145) 010881 146) 34.802 147) 2,700 gnificant. Several are done for you. 143) 5000000 149) 0.000100 150) 1.005 151) 2.0550 152) 0.0050 153) 30.4 154) 54.000 155) 90 156) 900.0 157) 0.050 153) 5000 159) 500,000,000 160) 24,091,300 161) 0.00600 162) 20.040 - “firm-mm Put these numbers lute scientific notation. The number in parenthesis after certain pmbiems indicates the number of significant figures to have in the answer. 1) 0.000034 '2) 65000 (3) .3) 36(1)!) x 10“1 (3) 4) 549 5) 010G140?» x 1012 6) (1W 7) 0000000000205 8) 21.814 10“ _ 9) 0.00973 x 108 10) 0.0000070 11) 3.621.471 12) 3,752.6 13) 456.83 14) 215 15) 0.0428 16) 0.0000567 3 17) 000000000900 18) am 19) 0000000010 20) 0.0037004 This number happens 21) 0.002 22) 0.0080 x 103 23) 360w x 10“" (3) 24) 0.156 25) 0.045 x 10'3 26) 10.051: 109 27) 55000000 28) 325 x 104 29) 5,921,000,000 30) 42.372 31) 362516171010 32) 23000000000 (4) 33) 0.000080 x 10-7 34) 7.000.631 35) 0.111573 36) 0.507 37) 0.000421 x 1015 38) 013723 39) 0.1131123 40) um 40m ' 4365011136) 43) 0.0000200 44) 0.000324 45) 67000 x 10'4 46) 2.68 x 10‘15 47) 70 x 10-8 48) 96.400 49) 0.000521 X 1012 50) 2.538 51) 240.0“) 52) 741,911] 53) 5.000 54) 0.01010 55) 0.0005438 56) 0.00483 x 1015 5'?) 0.0000054 58) 075140000 59) 0130000614 x 10'33 to have a special meaning in chemistry and. in fact. has a name. It is called Avogadro’s Number. Ynu'li lean about it next unit. For now. put it in scientific notation. 60) 602,200,000,000,(K)0,000,000.0m Take these numbers out of scientific notation and write then as standard numbers. 61) 9.481 x 1043 62) 3.64 x 104 63) 2.973 x 101 64) 2.343 x 101 65) 4.29 x 106 66) 2.97 x 10-4 67) 5.9267 x 10‘1 68) 2.4863 x 107 69) 4.000 x 10‘2 70) 6.022 x 1023 71) 4.763 x 103 . 72) 2.08 X 1010 83) 2.14 X 10'3 73) 3.9734 x 105 84) 0.285 X 103 74) 3.487 X 103 85) 2.9265 x 105 75) 9.5000 x 100 86) 8.48 x 102 76) 5.63 x 104 I 87) 3.286 x 104 77) 3.88 x 10‘2 88) 5-55 x 10-1 78) 8.654 X 10-2 89) 2.5417 X 10'3 79) 2.251 X 10-1 90) 1.452 X 10—3 80) 7.83 X 10-3 91) 8.429 x 10'1 81) 5.8043 x 102 92) 5.14300 x 103 93) 4.92 x 10‘5 82) 8.673 x 10'7 94) 3.00}: 1010 95) 6.7978 x 100 90) 8.7321 x 104 97) 3.03 X 107 98) 5.92000 x 102 99) 3.7283 X 10'4 100) 9.865 x 10-5 101) 2.685 x 10"6 102) 5.370 x 10.2 103) 4.37521 x 103 104) 2.986 X 10“4 mmmmmm 0.75 kg to milligrams 1500 millimeters to km 1. 2. 3. 2390 g to kg 4. 0.52 km to meters 5. 65 kg to g 6. 7 7.0.25 megameters to cm 8. 9. 2.77 kg to mg 10. 2.90 cm to megameters 11. 45.6 microliters to megaliters 12. 1.08 kg to pg 13. 9.57 x 10-3 mm to nanometers 14. 2.00 L to mL 15. 35.28 1111. to L 16. 5000 cubic centimeters to mL - 17. 3.5 L to cubic centimeters 18. km 111.105 m .19. In in 2.0043 x 10-5 km? 20. km in 1.549 micrometers; in 1.549 x 10'9 pm 21. cm in 7.8835 x105 mm 22. mm in 5.97 x 10‘3 pm 23. cm there are in 6.24 x103 km 24. meters in 0.0031 km 25. 3.44 x 10‘5 cm. Convert to micrometers 26. milligrams in 10.00 kg 27. 0.6321 kg. What's the mass in gms. 28. 458 centigrams. What's it in milligrams? 29. kg m _____ ifit is 2.023 x103 mg 30. 89.00 gms = __ in centigrams 31. micrograms = _ 00.00031 3 32. milligrams = __ if 6.2 x 104 micrograms 33. 50 kmlhr to cm/sec 34. 66 ftlsecond to mileslhr- 35. A light-year is the distance that light can travel in one year. If the sun is 150,000,000 km away, how many light years is the sun from earth? Assume light travels at a speed of 3.0 x 1010 cmlsec. Wm'ksheet-Dalsity There are physical characteristics of a substance that help identify the substance. One of these characteristics is density. Density (whose symbol is the lowercase letter d) is defined as mass per unit volume. Density is calculated by dividing the mass of an object by its volume. This is shown in equation form, as follows: Density = mass + volume We can calculate the density of a solid, liquid, or gas. The density of a gas will be dealt with elsewhere, because its density is very sensitive to temperature and pressure. Although the density of liquids and solids do change with temperature and pressure changes. the amount is fairly small. We will ignore these small amounts and act as if all our density problems are at the same temperature and pressure. Note carefully the difference in units in the formulas of the density of a solid and liquid. The unit for cubic centimeters is cm3 and for milliliters is ml... I solid (1 = grams + cubic centimeters liquid d = grams ~:~ milliliters 1) A sample of seawater weighs 158 g and has a volume of 156 mL What is its density? 42) A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density? 3) A cylindrical box with a volume of 200. cm3 holds 432.0 g of sodium chloride. From these data. calculate the density of sodium chloride. (Ignore the space between the NaCl crystals.) 4) Sugar is used to fill the box in problem 3 and the weight of sugar used is equal to 316.0 g. What is sugar’s density? (Ignore the Space between sugar crystals.) 5) Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The mercury used to fill the cylinder weighs 306.0 g. From this information, calculate the density of Hg. 6) What is the weight of the ethyl alcohol that exactly fills a 200.0 ml. container? The density of ethyl alcohol is 0.789 g/mL. 7) Calcnlate the density of helium (in g/L) if a balloon with a capacity of 5.00 L holds 0.890 g. 8) A flask built to hold exactly 2.5000 1.. is filled with nitrogen. The weight of the nitrogen in the flask at standard conditions is 0.1250 g. Calculate the density for nitrogen. 9) A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is found to be 703.55 g. From this information. calculate the density of carbon tetrachloride. 10) A rubber balloon weighing 144.85 g is filled with carbon dioxide gas and reweighed. The weight of the balloon plus gas is 153.77 g. The volume of the balloon filled with carbon dioxide is 4.55 L. What density do these data yield for carbon dioxide? 11) Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g. 12) Find the weight of 250.0 ml. of benzene. The density of benzene is 0.90. g/mL. 13) A block of lead has dimensions of 4.5 cm by 5.2 cm by 6.0 cm. The block weighs 1587 g. From this information. calculate the density lead. 14) 28.5 g of iron shot is added to a graduated cylinder containing 45.5 ml. of water. The water level rises to the 49.1 mL mark. From this information. calculate the density of iron. 15) A cylindrical glass tube of length 27.75 cm. and the radius 2.00 cm is filled with argon gas. The empty tube weighs 188.25 3. and the tube filled with argon weighs 188.87 3. Use the data to calculate the density of argon gas. (Volume of a cylinder = przh) 16) What volume of silver metal will weigh exactly 2500.0 g? The density of silver is 10.5 glcm3. 17) What is the weight of 215 L of hydrogen sulfide gas if the density of hydrogen sulfide is 1.54 g/L? 18) The helium gas stored inside a large weather balloon weighs 13.558 3. What is the volume of thisballoon if the density of helium is 0.1786 g/L? 19) A rectangular block of copper metal weighs 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, what is the density of copper? ...
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This note was uploaded on 02/06/2012 for the course BIO 210 taught by Professor Tricca during the Fall '11 term at Canada College.

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Worksheet_SigFigs_SciNota_DimAnaly_Density - Determine how...

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