Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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9 and 10 answer both
50. The angle iron shown to the right is made of steel with a density of
7.78 g/cm³. What is the mass, in g, of this object?
10.22
cm
1.35 cm
8.10 cm
1.35 cm
Conversion Factors in Calculations
Report Sheet - Lab 2
B. Signlficant Figures in Calculations
B.1 Perform the following multiplication and division calculations. Give a final answer with the correct
number of significant figures:
4.5 x 0.28
0.1184 x 8.00 x 0.0345
(42.4)(15.6)
1.265
(35.56)(1.45)
(4.8)(0.56)
B.2 Perform the following addition and subtraction calculations. Give a final answer with the correct
number of significant figures.
Pre
settin
2-Line
entry of up
Entry Line).
11 digits scrolf
line. Press 2nd
immediately to the
The second line (Res
digits, plus a decimal po
indicator, and a 2-digit pos
Results that exceed the digr
Notation.
Indicator Definition
2nd function.
2nd
UVD
Hunohali
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- Done < AA www-awu.aleks.com MEASUREMENT Multiplication and division of... Decide whether each proposed multiplication or division of measurements is possible. If it is possible, v last column of the table. proposed multiplication or division Is this possible? result x10 (2.0 mg) - (0.020 g) = ? yes ola no Ar yes (4.0 g) · (6.0 mL) = ? no yes (2.4 em) · (0.30 m) = ? %3D no Explanation Check © 2021 McGraw-Hill Education. All Rights Reserved.arrow_forwardTo divide numbers in scientific notation: divide the digit terms and subtract the exponents. (A x 10)/(B x 10²) (A/B) x 10 Y-z (5.6 x 105)/(1.8 x 10²) = (5.6/1.8) x 105-2 (You may have to put numbers back in proper notation!) Perform these calculations (2.2 x 104) (1.3 x 10²) = (1.6 x 1033)/(1.3 x 10-6) = (4.6 x 1022) (1.2 x 10-8) = (5.6 x 107)/(1.0 x 10²) = (2.6 x 10²) (1.1 x 10-²) = = 3.1 x 10³ not used this semester. Before Adding and subtracting in scientific notation performing this function you must make the exponents the same first. 1.0 x 102 Example: 1.2 x 105 + You can't just add the digit terms because one is really a very large number so either take them both out of notation then add 120000 + 100 = 120100 or write one of the numbers out of proper notation in order to get the same exponent: now write in proper notation 1.201 x 105 1200 x 102 +1.0 x 10² = 1201 x 10²arrow_forwardBob and Jill are measuring the height of Mr. Chenet (Mr Chenet is 1.8593 meters tall). Bob gets a measurement of 1.6329, while Jill gets a measurement of 1.8. This means that Bob is more accurate, while Jill is more precise. True or False?arrow_forward
- For the image attached be sure your answers have the correct number of significant figures plus show calculationsarrow_forwardPerform the following calculations, and report numbers with correct significant figures: (6.626 x 1023) (3.00 x 108) ÷(4.5 x 10-7)A) 4.417 x 1038 B) 4.42 x 1038 C) 4.41 x 1038 D) 4.4 x 1038 E) None of the above Group of answer choices A B C D Earrow_forwardNot sure what I am doing wrong here...arrow_forward
- how many significant figures will be in the result of the following calculation (11.130 - 2.50) * 10^4 / (107.35 + 16.51)* 10^-6 a. 4 b. 2 c. 1 d. 3 please choose the correct answerarrow_forwardFind the difference between the value of x2 and the sum of x1 plus x3.; let x4 be equivalent to the sum of x1 and x3 and let x5 be the difference between x2 and x5. This calculation scheme is shown below. Make notes about any similarities or differences between the values in your notes. x4 = x1 + x3 x5 = x2 – x4 Data Analyis This section will include all data collected during the lab. Thermochemical Data Tinitial (°C) Tfinal (°C) ΔT (°C) moles NaOH qreaction (kJ) ΔHrxn Reaction 1 25.0 30.3 +5.3 0.025 -1.11 -44.4 Reaction 2 25.0 37.0 +12.0 0.025 -2.51 -100.4 Reaction 3 25.0 31.7 +6.7 0.025 -1.40 -56.1 Reaction 1: NaOH(s) → Na+(aq) + OH-(aq) + x1 kJ 1g /39.977g/mol = 0.025 moles Moles NaOH = 0.025 qsolution = (4.184 J/g °C) (50.0g) (30.3°C -25.0°C) = -1108.76 J/ 1000 qreaction (kJ) = -1.11 kJ ΔH = -1.11 kJ/ 0.025 moles ΔHrxn = -44.4 kJ/mol…arrow_forwardPlease refer to this table underneath. I have the answer for Part A I need help with Part B & C. Thanks. Kelvin Fahrenheit Celsius 273.0 K. ? 0.0∘C ? -37.0 ∘F. ? 386.0 K. ? ? PART A : Complete the first row. Express your answer using one decimal place. I have the part A the answer is 32∘F. PART B: Complete the second row. Express your answers using one decimal place separated by a comma. ? PART C: Complete the third row. Express your answers using one decimal place separated by a comma.arrow_forward
- Assignment/take Covalent Activity.do?locator=assignment-take $ 4 Submit Answer [Review Topics] [References] Use the References to access important values if needed for this question. a. When 68.938 and 17.6 are added, the answer should be based on 2 significant figure(s). Enter the answer with the correct number of digits. 68.938 +17.6 = 104.54 decimal place(s) b. When 99.137 is divided by 44.926, the answer should be based on 2✔ significant figure(s) Enter the answer with the correct number of digits. 99.137 44.926= 2.21 F4 % 5 Retry Entire Group 4 more group attempts remaining F5 Cengage Learning Cengage Technical Support 6 MacBook Air F6 & 7 A F7 * CO ㅊ입 ▷II F8 ( 9 4 F9 ) A O F10 VOTING NOVE us.shein.com SHEIN X VACA CONTEST art would you II Previous Email Instructor F11 + 11arrow_forwardAn object will sink in a liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 9.83 g. If the volume of this sphere is less than ________ cm3, then the sphere will sink in liquid mercury (density = 13.6 g/cm3). Group of answer choices 7.48arrow_forwardPerform calculation, and give an answer with the correct number of significant figurearrow_forward
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