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Chemistry Homework from Ivy Tech, Exercises of Chemistry

This document is an attempt at chemistry homework.

Typology: Exercises

2023/2024

Uploaded on 09/04/2024

ashli-fledderman
ashli-fledderman 🇺🇸

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Significant Figures and Rounding Measurements Name ___Ashli
Fledderman___________Per 36N
1. Round off each of the following numbers to three significant figures
a. 15.9994 16.0 b. 1.0080 1.01
c. 0.6654 0.665 d. 4885 4890
e. 87,550 876,000 f. 0.027225 0.272
2. Put the following numbers into scientific notation and write down the number of
significant digits in each:
a. 0.225 2.25x10^-1 3 sig figs b. 2.500 2.50x10^0 3 sig figs
c. 44,163 4.4162x10^4 3 sig figs d. 20,190 2.019x10^4 4 sig figs
e. 0.000000000009910 9.910x10^-12 4 sig figs f. 7,000. 7x10^3 4 sig figs
3. How many significant figures are in each of the following numbers?
a. 225.0 4 sig figs b. 1000.0 5 sig figs
c. 0.0003210 4 sig figs d. 0.0067 2 sig figs
e. 1,000,000. 7 sig figs f. 2.00001 6 sig figs
4. Perform the indicated arithmetic operations, and round the results to the appropriate
number of significant digits. (see the back also)
a. 77.981 x 2.33 =181.7 rounded to 4 sigs figs
b. 4 x 0.0665 =0.27 rounded to 2 sig figs
c.4417.344+ 4.900 + 23.144444= 45.3 rounded to 3 sig figs
44444444444444444444444444444444444444444444444444444444
d. 9.80 – 4.762 =5.04 rounded to 3 sig figs
e. 3.9 x 6.05 x 420 =9900 rounded to 2 sig figs
f. 14.1 / 5 =2.8 rounded to 2 sig figs
g. 1001 + 16.23 44=1017 rounded to 4 sig figs44
h. 424.5 + 2.84614=427.3 rounded to 4 sig figs44
i. 9.9 – 9.544444=0.36 rounded to 2 sig figs
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Significant Figures and Rounding Measurements Name ___Ashli

Fledderman___________Per 36N

  1. Round off each of the following numbers to three significant figures a. 15.9994 16.0 b. 1.0080 1. c. 0.6654 0.665 d. 4885 4890 e. 87,550 876,000 f. 0.027225 0.
  2. Put the following numbers into scientific notation and write down the number of significant digits in each: a. 0.225 2.25x10^-1 3 sig figs b. 2.500 2.50x10^0 3 sig figs c. 44,163 4.4162x10^4 3 sig figs d. 20,190 2.019x10^4 4 sig figs e. 0.000000000009910 9.910x10^-12 4 sig figs f. 7,000. 7x10^3 4 sig figs
  3. How many significant figures are in each of the following numbers? a. 225.0 4 sig figs b. 1000.0 5 sig figs c. 0.0003210 4 sig figs d. 0.0067 2 sig figs e. 1,000,000. 7 sig figs f. 2.00001 6 sig figs
  4. Perform the indicated arithmetic operations, and round the results to the appropriate number of significant digits. (see the back also) a. 77.981 x 2.33 =181.7 rounded to 4 sigs figs b. 4 x 0.0665 =0.27 rounded to 2 sig figs c. 17.34 + 4.900 + 23.1 = 45.3 rounded to 3 sig figs d. 9.80 – 4.762 =5.04 rounded to 3 sig figs e. 3.9 x 6.05 x 420 =9900 rounded to 2 sig figs f. 14.1 / 5 =2.8 rounded to 2 sig figs g. 1001 + 16.23 =1017 rounded to 4 sig figs h. 424.5 + 2.8461 =427.3 rounded to 4 sig figs i. 9.9 – 9.54 =0.36 rounded to 2 sig figs

j. 7.3778 – 0.000265 =7.378 rounded to 4 sig figs k. (24.358)(6.4) =156 rounded to 3 sig figs l. 48.6(0.6959) =33.8 rounded to 3 sig figs m. 23081 / 0.8981 =25700 rounded to 3 sig figs n. 550 + 27.3 =580 rounded to 2 sig figs o. 43,000 – 3,700 = 39000 rounded to 2 sig figs p. 6,400 x 4.34 =27800 rounded to 3 sig figs