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
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Introductory Chemistry: Concepts and Critical Thinking (8th Edition)
- When 12.6 g calcium carbonate (the principal component of chalk) is treated with 63.0 mL hydrochloric acid (muriatic acid sold in hardware stores; density = 1.096 g/mL), the calcium carbonate reacts with the acid, goes into solution, and carbon dioxide gas bubbles out of the solution. After all of the carbon dioxide has escaped, the solution weighs 76.1 g. Calculate the volume (in liters) of carbon dioxide gas that was produced. (The density of the carbon dioxide gas is 1.798 g/L.)arrow_forwardA chemist must dilute 85.6 mL of 119. mM aqueous potassium permanganate (KMnO4) solution until the concentration falls to 7.00 mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Round your answer to 3 significant digits. OL 0 x Sarrow_forward1. Suppose some measurements are made on two different homogeneous stones to find out if they are made of the same kind of rock. The mass and volume measurements are listed below. Are the two stones the same type of rock? Why or why not? Show all calculations. Mass Volume 58.0 grams 50.1 grams 20.0 cm3 15.0 cm3 Stone 1 Stone 2arrow_forward
- Suppose some measurements are made on two different homogeneous stones to find out if they are made of the same kind of rock. The mass and volume measurements are listed below. Are the two stones the same type of rock? Why or why not? Show all calculations. Mass Volume Calculations Stone 1 58.0 g 20.0 cm Stone 2 50.1 g 15.0 cm3 21/common/assets/pdfjs/1.0.0.30/web/viewer.ht...ndered-pdf&fullscreen=Dd21-fileviewer-rendered-pdf-dialog&height=746#0arrow_forwardExpress (7.64x10^5) g in SI base units using scientific notation.arrow_forwardA chemist weighed out 7.64 g of tungsten. Calculate the number of moles of tungsten she weighed out. Round your answer to 3 significant digits. mol x10 X Ĺšarrow_forward
- A chemist determined by measurements that 0.015 moles of gallium participated in a chemical reaction. Calculate the mass of gallium that participated in the chemical reaction. Be sure your answer has the correct number of significant digits.arrow_forwardMultiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits. 93.4 0.934 mol L Explanation 988.9 mol + 0.68 L = [ mol L X 26. L = = mol Check Ă— 1.35 L = mol W mol 3 E 65 X MacBook Pro 7 2022 McGraw Hill LLC. All Rights Reserved. Term=arrow_forwardA chemist measures the amount of chlorine gas produced during an experiment. She finds that 59.1 g of chlorine gas is produced. Calculate the number of moles of chlorine gas produced. Be sure your answer has the correct number of significant digits. olo O mol 18 Ar x10arrow_forward
- A chemist weighed out 22.5 g of calcium. Calculate the number of moles of calcium she weighed out. Be sure your answer has the correct number of significant digits. mol X 5arrow_forwardA sample of lead has a mass of 0.490. Calculate the number of moles. Your answer should be rounded to the correct number of significant figures and written in scientific notation.arrow_forwardMultiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits. mol 78.08 x 38. L mol x10 m 932.0 m + 62.3 s mol x 25. L L |mol 20.94arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning