80. Perform the following calculations and report your answer with the proper number of significant digits. a. (4.66 x 102 mm²) / (23.3 mm) b. (3.18 x 10-5 m³) / (6.929 × 10-8 m) c. (215 g) / (3.5 × 10² mL) d. (19.55 g) / (21.21 mL) e. (6.172 x 105 m²)(7.17 x 102 m) f. (6.33 g) + (12.3 × 10~2 g)

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Chemistry A chemist prepares a solution of potassium iodide (KI) by weighing out 145. g of potassium iodide into a 100 ml. volumetric flask and filling the flask to the mark with water. Calculate the concentration in g/dl. of the chemist's potassium iodide solution. Round your answer to 3 significant digits. 02

significant figures and units. 3. Perform the following calculations and report the answer with the correct number of A. (9.2030 g)(0.00230 g) + 0.1020 g² = 00²0211237 0.10205² 0.123292 B. 234.020 g- 184.08 g 382.402 mL-326.322 mL (1 fl oz = 29.6 mL) 4. An aluminum beverage can contains 12.0 fluid ounces of liquid. Express this volume in liters. 12. uffaz X 560 080ML 49.949 = 0.8905g/mL CHE 1011 29.6mL = 355.2 mL Ift:0² (1 in = 2.54 cm) 5. What is the volume, in cubic centimeters, of a brick that is 4.0 in x 2.7 in × 8.0 in? 4.0A x 2,54 cm = 10.16cm liAcc 207 + x 2.54cm = 60858cm هذا 8.0MAX 2.54cm ITA 20032cm So volume 20.32cm x 6.858cm x 200320 1415.84 cm³ 6. The S.I. unit of energy is the joule, J (1 J = 1 kgom²/s²). Another energy unit, the erg, was once in widespread use (1 erg = 1 gocm²/s²). Calculate the number of ergs in 1.0 J. Page 2 of 2

1. Why are units so important in measurement? Giving examples of measurements with no units should help. 2.  What does it mean to say that 2 expressions are equivalent?

M Gmail YouTube = Maps O MEASUREMENT Counting significant digits when measurements are multiplied o... Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits. 764.45 g 0.39 mL = 786.4 mol 48.853 L 7.81 mol L X 4.25 L = = 0 g mL mol 0- mol x10 X Ś 0/5 Olivi.

9- Calculate the volume in liters of a 1.7 x 10 mol/L mercury(I) chloride solution that contains 325. µmol of mercury(I) chloride (Hg,Cl,). Round your answer to 2 significant digits. dlo ?