Individual atoms, ions, molecules are small and light that can't be measured with nomal balances. Avogadro's number, 6.022 x 1023, is used to scale them up. A collection of 6.022 x 10 23 particles is defined as one mole. Mass of one mole of a substance is called molar mass, with a unit g/mol. Mass of one mole of a substances usually weight in grams, which can be measured with a conventional balance. In 1794, Joseph Proust published the Law of Definite Proportions, for which he is most famous for. Proust stated this law the following way: "A chemical compound always contains the same elements combined together in the same proportion by mass." This law implies that a known substance has a known composition, thus a known chemical formula. Based on the chemical formula, we can calculate the molar mass of the substances by summing up each atom's atomic weight. Avogadro's number and molar mass are the two most fundamental mole concepts. They are used to connect the number of particles on the atomic level to the measurements made on the bulk scale. Mole Concepts Practices In this lab, you will carry out conversations between mass and mole using molar mass, and convertions between mole and number of particles using Avogadro's number (6.022 x 1023). The conversions are shown as a flow chart where mole is the common ground. Particles number Mass (g) (atoms, molecules, ions) 6.02X1023 Molar Mass Moles (mol)
Individual atoms, ions, molecules are small and light that can't be measured with nomal balances. Avogadro's number, 6.022 x 1023, is used to scale them up. A collection of 6.022 x 10 23 particles is defined as one mole. Mass of one mole of a substance is called molar mass, with a unit g/mol. Mass of one mole of a substances usually weight in grams, which can be measured with a conventional balance. In 1794, Joseph Proust published the Law of Definite Proportions, for which he is most famous for. Proust stated this law the following way: "A chemical compound always contains the same elements combined together in the same proportion by mass." This law implies that a known substance has a known composition, thus a known chemical formula. Based on the chemical formula, we can calculate the molar mass of the substances by summing up each atom's atomic weight. Avogadro's number and molar mass are the two most fundamental mole concepts. They are used to connect the number of particles on the atomic level to the measurements made on the bulk scale. Mole Concepts Practices In this lab, you will carry out conversations between mass and mole using molar mass, and convertions between mole and number of particles using Avogadro's number (6.022 x 1023). The conversions are shown as a flow chart where mole is the common ground. Particles number Mass (g) (atoms, molecules, ions) 6.02X1023 Molar Mass Moles (mol)
World of Chemistry, 3rd edition
3rd Edition
ISBN:9781133109655
Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste
Chapter9: Chemical Quantities
Section: Chapter Questions
Problem 35A
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