Concept explainers
Interpretation:
The mass of a helium atom given as
Concept introduction:
The ordinary numbers are written as the power of
In scientific notation, the non-zero significant numbers are written along with the power of
Want to see the full answer?
Check out a sample textbook solutionChapter PSS Solutions
Introductory Chemistry: Concepts and Critical Thinking Plus MasteringChemistry with eText -- Access Card Package
- 1.90 A calibrated flask was filled to the 25.00-mL mark with ethyl alcohol and was found to have a mass of 19.7325 g. In a second experiment, 25.0920 g of metal beads were put into the container and the flask was again filled to the 25.00-mL mark. The total mass of the metal plus the alcohol was 43 .0725 g. Describe how to determine the density of the metal sample.arrow_forwardZinc ore (zinc sulfide) is treated with sulfuric acid, leaving a solution with some undissolved bits of material and releasing hydrogen sulfide gas. If 10.8 g of zinc ore is treated with 50.0 mL of sulfuric arid (density 1.153 g/mL), 65.1 g of solution and undissolved material remains. In addition, hydrogen sulfide (density 1.393 g/L) is evolved. What is the volume (in liters) of this gas?arrow_forwardCalculate these volumes. What is the volume of 11.3 g graphite, density = 2.25 g/cm3 What is the volume of 39.657 g bromine, density = 2.928 g/cm3arrow_forward
- Air is 21% oxygen by volume. Oxygen has a density of 1.31 g/L. What is the volume, in liters, of a room that holds enough air to contain 55 kg of oxygen?arrow_forward1.65 An industrial engineer is designing a process to manufacture bullets. The mass of each bullet must be within 0.2 5% of 150 grains. What range of bullet masses, in mg, will meet this tolerance? 1 grain = 64.79891 mg.arrow_forwardAlthough your textbook lists (he rules for converting an ordinary number to scientific notation, oftentimes students remember such rules better ¡f they put them into their own words. Pretend you are helping your 12-year-old niece with her math homework, and write a paragraph explaining to her how to convert the ordinary number 2421 to scientific notation.arrow_forward
- Scientific models do not describe reality. They are simplifications aid therefore incorrect at some level. So why are models useful?arrow_forwardComplete the following conversions between SI units. 612g = mg 8.160 m ______ cm 3779 g = ________ g 781 mL = ______ L 4.18 kg = g 27.8 m = ______ km 0.13 mL = ______ L 1738 km ______ m 1.9 Gg = garrow_forwardA chemist must dilute 78.3 mL of 9.91 mM aqueous calcium sulfate (CaSO4) solution until the concentration falls to 3.00 mM. She'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits. ĂšL x10 ?arrow_forward
- write the scientific notation of 204.5 x 10^21 and 2 x 10^25arrow_forwardThe number 0.00754605000 whenconverted to standard exponential (or scientific) notation becomes ____  a. 7.55 x 103  b. 7.54605 x 10-3  c. 7.54605000 x 10-3  d. 7.54605000 x 103arrow_forwardBelow is the data from a hypothetical experiment. The actual density of the substance is 2.37 g/mL. How would the quality of this data be characterizedarrow_forward
- Chemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub CoChemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
- Chemistry by OpenStax (2015-05-04)ChemistryISBN:9781938168390Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark BlaserPublisher:OpenStaxChemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning