CHE101 Mod 1 ME

I don't understand the wording. The least significant digit means the last digit?  7.700 X 2.1 = 16.17     would the uncertainty be  0.01 ? 2.132 + 17 + 4.04 = 23.172   would the uncertainty be 0.001 ?

Can you help me answer this questions 4 and 5, this is from the previous question I just split my question, thanks

Question 1: Determine whether the answer to each calculation has the correct number of significant figures. If not, correct it: 1A) 89.763 + 22.4581 = 3.997 1B) 4.32x1012 ÷ 3.1x104 = 1.4x1016 Question 2: Perform this calculation to the correct number of significant figures 9443 + 45 – 9.9 x 8.1x106 Question 3: Perform the following conversions: 3A) 78.3 cm to inches 3B) 22.5 lbs. to micrograms 3C) 396 in to L 4A) A new penny has a mass of 2.49g and a volume of 0.349cm³. Is the penny pure copper?

Round each answer to the correct number of significant figures. 9 +2.8 - 0.135+10.8=22.265 My previous answer was 22.3 it was incorrected.

Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits. 2 78.08 cm x 38. cm = 3.0 x 10 cm 20.9476 mol L Explanation - x 47. L = mol 451.5 m + 51.4 s = Check ES m 0- 10 X © 2023 McGraw Hill LLC. All Rights Reserved

2. A student is told to determine the density of a solid unknown cylinder. The mass of the unknown cylinder is 56.38 grams. The unknown cylinder is 4.95 cm high and has a radius of 1.28 cm. The student measures the correct mass but measures the height as 4.96 cm and the radius as 1.30 cm. What will be the percent error in the student's density value? True- Experimental| x100 Percent Error = True

= 1 = 2 = 3 Continue Cube's Mass Edge Length 72.576 g 1.72 cm 4 Percent error = 0% X 5 090 6 cm A student experimentally determines the density of a metal cube. The edge length of the cube is measured using calipers. The cube's true density is 12.30 Use the student's collected data below and calculate the percent error for the measurement. Be sure your answer has the correct number of significant digits. Student's Collected Data: S 7 8 9 MacBook Air 8 10 F7 g DII F8 F9 3. olo Submit Assignr 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Acc Ar ALL F10 W

Do not give handwriting solution.

Add or subtract the following measurements. Be sure each answer you enter contains the correct number of significant digits. 11.68 g +0.620 g = 4.500 g 0.70 g = 0g 16.80 g 0.670 g = Explanation Check e X % 5 3 Ⓒ2023 McGraw Hill LLC. All Rights Reserved. Terms of Use CH ♫ A SJA 8

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Please don't provide handwriting solution

Are the answers written using the right number of significant figures? Explain. 1) 15.20+37580+29.5876= 37625.0 2) (3.46*10^3) x( 4.7*10^2)= 1.63 x10^6 3) 513 x 410= 210330 4) 14.0/11.263= 1.24 5) 3134*0.000054= 0.1692| 1 FOcus

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

Put answers in scientific notation. 1. 1.15x10^4+8.24x10^-4 2. 5.37 x 10^4 + 1.00 x10^8/5.63x10^4 3. 7.00 x10^-6/(1.15x10^4)(8.23x10^-4)

please see attached image

Complete each of the following calculations, and give your answer to the correct number of significant figures. 710/33= Express your answer to the correct number of significant figures. Submit Part B Submit Part C ΑΣΦ 0.05 +23.3= Express your answer to the correct number of significant figures. Request Answer Submit ΑΣΦ Request Answer ? VE ΑΣΦ 0.00303 x 101 = Express your answer to the correct number of significant figures. ? ? Previous Answers Request Answer

1I bought a necklace which the seller said was made from silver. I decided to check if the necklace was truly silver. The density should be about the density of silver. The density the experiment in the lab. was done using water and a graduated cylinder to collect the following data: Mass of necklace = 12.306 g Volume of just water in the graduated cylinder = 7.64 cm3 Volume of water + necklace in the graduated cylinder = 8.81 cm3 1. What is the measured VOLUME of the necklace 2. What is the density of the necklace? Show all working 3. Considering just the data in the table and the calculations in the previous two questions: If a more precise balance had been used (i.e. the mass was measured with an additional significant figure), would the number of significant figures in the calculated density increase, decrease or remain the same? Explain in no more than one sentence. 4. Is the necklace made of silver? Density of silver is 10.49g/ cm3. Tick a. or b.: a. YES b. NO 5. Why is it that a…

45°F Cloudy ||| O MEASUREMENT AND MATTER Using mass density to find mass or volume 11 A chemistry student needs 90.0 mL of carbon tetrachloride for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of carbon tetrachloride is 1.59 g cm ³. Calculate the mass of carbon tetrachloride the student should weigh out. -3 Round your answer to 3 significant digits. g Explanation Check x10 X Ś 0/5 Q Search Jessica 4 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility wwwwwwwwwwwww OL Ar

Add or subtract the following measurements. Be sure each answer you enter contains the correct number of significant digits. 6.920 mL 5.6 mL - = 14.607 mL + 10.87 mL = I Don't Know 11.70 mL +5.5 mL = Submit mL mL mL 3 4 R 0 x10 X 3 ~ tv Ⓒ2023 McGraw Hill LLC. All Rights Reserver Ⓡ S dh ZAC

Already posted this but the answers were wrong, I think the homework system is picky with scientific notation? Please help, I don’t understand how to do this very well. Thank you!