Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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2. Do the following calculations and use the correct number of significant figures in your answers. Assume all numbers are the results of measurements.
a. 0.208 + 4.9 + 1.11
b. 228 + 0.999 + 1.02
c. 8.543 − 7.954
d.(3.2 × 10−2) + (5.5 × 10−1) (hint: Write in the decimal form first, then add.)
e. 336.86 − 309.11
f. 21.66 − 0.02387
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
No need to explain. Just give the answers directly. Thank you.
1. Round off 1.274 to one (1) significant figure
2. Round off 1653 to one (1) significant figure
3. Round off 534.5 to three (3) significant figures
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- 1.87 A solution of ethanol in water has a volume of 54.2 mL and a mass of 49.6 g. what information would you need to look up and how would you determine the percentage of ethanol in this solution?arrow_forwardFor these questions, be sure to apply the rules for significant figures. a You are conducting an experiment where you need the volume of a box; you take the length, height, and width measurements and then multiply the values together to find the volume. You report the volume of the box as 0.310 m1. If two of your measurements were 0.7120 m and 0.52145 m, what was the other measurement? b If you were to add the two measurements from the first part of the problem to a third length measurement with the reported result of 1.509 m, what was the value of the third measurement?arrow_forwardI think I did a calculation wrong but I am having trouble understanding significant figures. In this problem, I am calculation the density of water from my previous calculations mass= 7.359g and volume=7.8mL. So I then divided 7.359g by 7.8mL to find density and got (.9434615385) on my calculator which I then turned into (.94) because I believe there should be 2 significant figures. Is (.94) correct or should 1.4 be the final answer?arrow_forward
- Assuming all of the numbers are measured quantities, perform the following arithmetic setups and give the answer to correct number of significant figures. 9.750 – 9.015 a. 1.811 9.345 + 3.005 b. 8.811 с. (7.50 + 8.53) х 7.71 d. 0.81 × 0.86 + 12.36arrow_forwardPlease answer all and please do the calculationsarrow_forwardO CHEMICAL REACTIONS Limiting reactants Gaseous methane (CH) will react with gaseous oxygen (O,) '2, to produce gaseous carbon dioxide (CO2) and gaseous water (H,0). Suppose 11.4 g of methane is mixed with 13. g of oxygen. Calculate the minimum mass of methane that could be left over by the chemical reaction. Round your answer to 2 significant digits. x10 garrow_forward
- part A: Sort the following numbers according to whether they should be rounded up or down when rounding to the nearest tenth (the first digit after the decimal). 3.1760, 4.319, 19.47, 5.82, 66.9214, 8878.2010, 7.084, 124.76 part B: Drag the answers that have been correctly rounded to the appropriate number of significant figures to their place in the table. To avoid rounding errors, start with the unrounded value before conducting each manipulation. Drag the appropriate labels to their respective targets. View Available Hint(s)for Part B Reset Help 14.93 Group 3 14.93 12 Group 1 12 14.92 Group 3 14.92 3.62 Group 4 3.62 14 Group 3 14 3.7 Group 4 3.7 15 Group 3 15 3.6 Group 4 3.6 15.0 Group 3 15.0 3.63 Group 4 3.63 14.9 Group 3 14.9 3.623 Group 4 3.623 12.47 Group 1 12.47 7.97 Group 2 7.97 12.46 Group 1 12.46 7.966 Group 2 7.966 12.4 Group 1 12.4 7.0 Group 2 7.0 13 Group 1 13 7.96 Group 2 7.96 12.5 Group 1 12.5 8.0 Group 2 8.0 3.622 Group 1…arrow_forward16. How many significant figures should the answer have if we multiply: 5.60 x 3.2 O 1 O 2 O 3arrow_forwardGaseous ethane (CH₂CH3) will react with gaseous oxygen (0₂) to produce gaseous carbon dioxide (CO₂) and gaseous water (H₂O). Suppose 0.601 g of ethane is mixed with 2.8 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 3 significant digits. g x10 X 3arrow_forward
- An atom of a particular element has a volume of 7.8 X 10-31 m3. What is this volume in cubic nanometers?arrow_forwardIn the lab you weigh 12.54 g of NaCl to make a stock solution of 5.12 M. To further dilute the solution to 100.0 mL of 0.125 M, how much of the stock solution do you need? Give your answer in mL. Use correct number of significant figures.arrow_forwardWhen you perform the following operations, how many significant figures should your answer have? Assume these are measured quantities. 312.3415 + 0.0100 = 07 8. 1 3 6.arrow_forward
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