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f. 6.022 X 1023 mol 2. Perform the following calculations and report your results to the correct number of significant figures a.212.2+26.77 402.09 6-1 b. 52.331 +26.01-0.998173 ande. (64,04-2.91)/(18.7-17)-11ae5F 24 d. (1.00866 -1.728)/(6.02205 x 10)- -1 195 Xlo e. (6.6262 x 1034, 2.998 x 108)/ (2.54 x 10°)- Lo 1,99745 x 10-25 3. Using dimensional analysis, perform the following conversions and report your results to the correct number of significant figures (centi 102; milli 10: micro 10; nano 10; pico 10): 7 a, 8.43 cm to mm CMA lo b. 2.41 X 102cm tom X c. 294.5 nm to cm 7 d. 620 uL to ml e, 87.444 pg to μg
4. An American football field is measured to be 100.00 yards long from goal line to goail line. To the correct number of significant figures, express this distance in nanometers (12 in 1 yard exactly; 2.54 cm-1 in exactly: 1 cm- 10 m exactly: 1 nm 10 m exactly) 5. How many milliliters of water (cm) do you have in a filled 350 cubic inch (in) container (2.54 cm -1 in exactly; 1 cm-1 mL exactly)? 6. Several 100.00 ml samples of contaminated air contained an average of 14.7767 pg of arsenic. How many cubic meters of air would contain 0500 kg of arsenic (1 pg 10g exactly 1 kg 10 & exactly)? density of a material is calculated by its mass divided by its volume (D mass/volume). In the lab you weigh an empty graduated cylinder and find that its mass is 100.0848 grams. After of an unknown metal into the cylinder, you find that the mass of the cylinder with pellets is 115.6448 g. Now you add 25.00 ml of water to the cylinder and when you read the total volume in the cylinder, the result is
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(a)212.2 26 77+ 402.09 21 2 2 0 402.o 52.33 1 + 26 O10 78 341 6 998 So 0 998 1 (64.04197 3 19.7 >61.13 1-7 35.95 (Arsd) (1.00866-1.728) /(6. с 220 5x10 2 3 ol 10086 6 o 66 es C1-00866-1.728) / (6.02205% 1023) 86 6 6.0 2205 X lo23 0.71934 602 205 X ID 23 0.119 4 23 x 10-(Ans。 ター(e)(6.6262% 10-54. 2.993 x 10g)/C2-54 X 10 사Herng the Law of工dice亼here a + b -31+8 2.6 = 10 x 6.626 2x2-99g ウ(19.865入10-26 Nouw ar -26+9-17 10 26 ラ10 -忏 2.5(a) 943 cm -to mm (b) 24) X Io om tom So 291.5 nm -to cm q 14 and Im lo0n -チd) 620 μ L to mL 3 So → 620x10-3 m L- 87-44P2 to尸 -12 .5 531-444 xIoo .744 XIO CA)

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