Ch.1 - Intro to General ChemistryWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Round off the following quantities to the number of significant figures indicated in parentheses.70.427 g (3)

Solution: Round off the following quantities to the number of significant figures indicated in parentheses.70.427 g (3)

Problem

Round off the following quantities to the number of significant figures indicated in parentheses.

70.427 g (3)

Solution

In this problem, we are asked to round off 70.427 into 3 significant numbers.


Recall that in determining the number of significant numbers, we following the following rules:

  • All nonzero digits are significant.
  • Zeroes between nonzero digits are significant.
  • Zeroes to the left of the nonzero digits are not significant, their only purpose is to indicate placement.
  • Zeroes to the right of the nonzero digits are categorized as follows:
    • Trailing zeroes after a decimal point are significant.
    • Trailing zeroes before the decimal point and after a nonzero digit are always significant.
    • Trailing zeroes before an implied decimal point is ambiguous and should be avoided by using scientific notation.
Solution BlurView Complete Written Solution