Practice Exam 1

y bartebly - Yahoo Search Results esc 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. 1 815.0 g +0.66 mL = 0 7.8084 cm x 2.4 cm. = Explanation Q 78.084 cm x 31. cm = cm² 2 A F1 2 Check W F2 S g mL #3 2 cm 80 F3 E D $ 4 Q F4 R F % 5 18 9 F5 T x10 X 6 G n C F6 3 Y & 7 H #tv ♫ Ⓡ F7 ©2022 McGraw Hill LLC All Rights Decanind all/AⒸ U *00 ALEKS-Kirsten Rodriguez - Learn 8 J DII F8 A - ( 9 K F9 Torme COLL 0 0 F1 L

2) _____________ mL

please make sure each answer has the correct number of significant digits

Robert was able to travel 292.0 miles in 4.000 hours and used 38 liters of gasoline. What was Robert's speed in feet per second? (5280 ft = 1 mi) • Your answer should have four significant figures (round your answer to one decimal place).

2. Evaluate each of the following expressions. State the answer to the proper number of significant figures. a) 73.74 kg - 27.23 kg = b) 500 feet - 35 feet = = d) 0.050 km x 15.38 km x 780.2 km - c) 64.0 g = 16.0 mL

Do the following calculations to the correct number of significant figures: a.) 89.3 x 77.0 x 0.08  b.) 4.005 x 74 x 0.007 c.) 9.5 x 103/34.56  d.) 87.6 + 9.888+ 2.3 + 100.77

Convert the following numbers to 2 significant figures, use scientific notation and use the (lowest/ highest) prefixes Example: 5 640 000 000 grams, 5.6X109 grams, 56 Gigagrams a) 29 819 497.814794 milliliters b) 0.000 000 165841 banana c) 1854 mols

Round each of the following numerical values to four significant figures and express the result in standard scientific notation. To express a number in scientific notation, write E# or e# in place of x10# . For example, 1.23E-4 is equivalent to 1.23 × 10-4. a) 104.38100 b) 125890 c) 0.000867510 d) 80.943 × 106 e) –0.0046800

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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.

Do the following calculations to the correct number of significant figures: MUST follow the rules of SIGNIFICANT figures  a.) 432/7.3-28.523 b.) 0.004 + 0.09879 c.)87.6 + 9.888 +2.3 + 100.77 d.) 5.01 x 105/7.8 x 102

5. Perform the following unit conversions. Show the setups for each conversion (cancel units). Give your answers to the correct number of significant figures. a) 275 yd to m b) 0.0053 gall to L c) 5.788 x 108 µg to lb d) 355 m/s to miles/hr

1000 900 800 700 600 500 400 300 200 100 A sample of liquid has a measured volume of 561 mL. 1. How many significant figures does the measurement have? 2. Suppose the volume measurement was made with a graduated cylinder just as you see above. How far apart were the scale divisions on the cylinder, in mL? 3. Which of the digits in the measurement is uncertain?

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Do the indicated arithmetic and give the answer to the correct number of significant figures. I.   II. 0.71 + 92.2 III. 934 × 0.00435 + 107 IV. (847.89 - 847.73) + 14673

First he measured the mass of the metal to be 349.0 grams. Then he dropped the metal into a measuring cup and found that it displaced 16.1 mL of water.Calculate the density of the metal.Density = ____ g / mLUse the table below to decide the identity of the metal. This metal is most likely ______ 2 .Densities of Some Common Substances Substance Density (g/mL) Water 1.00 Aluminum 2.72 Chromium 7.25 Nickel 8.91 Copper 8.94 Silver 10.50 Lead 11.34 Mercury 13.60 Gold 19.28 Tungsten 19.38 Platinum 21.46

Convert the following numbers to the SI system, use two significant figures in addition write them in scientific notation when necessary. (Remember to round off is a number is above 5) a) 1.854 lb  b) 0.0047838265 cm  c) 8807 mi  d) 5080 oz  e) 26711 mi/h    f) 0.00378 lb/in2

15) How many significant figures are in 4.010000kg? A) 7 B) 3 C) 5 16) What is the answer for the following calculation: 1.209 - 0.0204 ? A) 1.19 B) 1.189 1.1886 17) What is the answer for the following calculation: 0.0234 × 139.37 ? A) 3.26 B) 3.261258 3.261 18) What is the answer for the following calculation: (1.249 - 0.0234) × 139.37 ? A) 170.812 B) 170.8 C) 170.81 19) How many grams of iron are in 350. mg of iron? A) 0.350 g B) 3.50 g C) 35.0 g 20) Express 1.40 × 10-3 L in decimal notation. A) 0.00140 L B) 0.0014 L C) 0.014 L 21) A statement about mass always being conserved in a chemical reaction is an example of a A) theory B) hypothesis C) law

A chemist needs to know the mass of a sample of Na, S0, to 4 significant digits. She puts the sample on a digital scale. This is what the scale shows: 0 9 6.164 g If this measurement is precise enough for the chemist, round it to 4 significant digits. Otherwise, press the "No solution" button. A No x10 solution U::

Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits. esc 1 Q A Counting significant digits when measurements are multiplied o... N ÷ 849.55 m 53.56 s = 0.934 cm X 1.525 cm = cm = 0 93.4 cm x 10. cm = 0 Explanation 2 W S Check X 2 tion command 38 #3 E D 2 cm 2 cm C $ 4 R F do 5 % V T G X 6 MacBook Pro B Y & 7 H Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Priva U N 00 * 8 J ( 3 9 K O L 萬 P comman

4.-Convert the following numbers to scientific notation, use prefixes and use only 2 significant figures 52 X 10° g= 52Mg = 52 megagrams Example 52,000,000 g 0.0000003 g a. b. 26198151 L 1546 m C.

2. Calculate the circumference. Diameter of watch glass was 10.2cm