Get Informed (Explain) The collective counting words above (i.e. pair, tray, ream and case) are most often used C. on number of items in everyday life just as the grocery finds selling eggs by the dozen more convenient than selling them individual. All matter contain so many atoms so a unit of measurement for amount of substance called the mole (mol) has been established for use in counting atoms. A Mole (symbol: mol) is a number equal to the number of carbon atoms which is exactly 12 grams of pure Carbon - 12. It is the unit of measurement for amount of substances in the International System of Units (SI). Avogadro's Number (NA) is the number of particles in one mole of a substance which is equal to 6.02 x 1023 representative particles of that substance. Representative particles can either be atoms, molecules, or formula units. One mole of Carbon -12 contains 6.02 x 1023 atoms for elements, molecules for covalent compounds and formula units 6.022x 10

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter2: Chemical Formulas, Equations, And Reaction Yields
Section: Chapter Questions
Problem 32P: An element A has a triiodide with the formula AI3 and atrichloride with the formula ACl3 . The...
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1. How many bananas are equal to 9.75 moles of banana? 2. How many moles of tomatoes are in 5.01 x 10²⁵ tomatoes?
QUARTER 3, WEEKS 22
Get Informed (Explain)
ana
The collective counting words above (i.e. pair, tray, ream and case) are most often used
on number of items in everyday life just as the grocery finds selling eggs by the dozen more
convenient than selling them individual. All matter contain so many atoms so a unit of
measurement for amount of substance called the mole (mol) has been established for use in
counting atoms. A Mole (symbol: mol) is a number equal to the number of carbon atoms which is
exactly 12 grams of pure Carbon – 12. It is the unit of measurement for amount of substances in
the International System of Units (SI). Avogadro's Number (Na) is the number of particles in one
mole of a substance which is equal to 6.02 x 1023 representative particles of that substance.
Representative particles can either be atoms, molecules, or formula units. One mole of Carbon
- 12 contains 6.02 x 1023 atoms for elements, molecules for covalent compounds and formula units 6.022x10
for ionic compounds.
Examples: 1 mole of Sodium contains 6.02 x 1023 atoms of Sodium
da
1 mole of sugar contains 6.02 x 1023 water molecules
1 mole of Silver chloride contains 6.02 x 1023 formula units of Silver chloride
Avogadro's number = 6.02 x 1023 particles
A mole = 602, 000, 000, 000, 000, 000, 000, 000 things
Lorenzo Romano Amedeo Carlo Avogadro
- an Italian scientist
- The Avogadro's constant was named after
him even though he was not the one who
determined its value.
= 602 hexillion
Can you figure out how large Avogadro's number is, try
to imagine this, "If you put together 6.02 x 1023
basketballs, it will be as big as the Earth or if you
have 6.02 x 1023 rice grains, it would cover the land
masses of the Earth to a depth of 75 meters or if
you have 6.02 x 1023 doughnuts, you would reach
the sun from the Earth and vice versa 200 billion
Jean Baptiste Perrin - was a French
physicist who first used the Avogadro's
constant.
Friedrich Wilhelm Ostwald was a Baltic
German chemist and philosopher who first
propounded the used of the term Mole as a
times.
standard unit of measurement of chemical
substance in the year 1900.
Mole Day is an unofficial holiday celebrated among chemists, chemistry students and chemistry enthusiasts on
October 23, between 6:02 a.m. and 6:02 p.m.
Now that you have recognized how big Avogadro's number is, let us try to think about the number of particles in a given
sample. We will use the dimensional analysis approach to convert the number of moles to its equivalent amount in the
number of particles.
Sample Problem 1: How many molecules are there in 3.0 moles of CO2?
Given: No. of moles = 3.0 moles CO2
Solution: 3.0 moles CO2 x 6.02 x 1023 molecules CO2
1 mole = 6.02 x 1023 molecules CO2
1 móle CO2
= 18.06 x 1023 molecules CO2
= 1.806 x 1024 molecules CO2
Find: No. of molecules CO2
Sample Problem 2: How many moles of mongo
seeds are equal to 1.709 x 1024 mongo seeds?
Given:
No. of mongo seeds = 1.709 x 1024 mongo seeds
1 mole = 6.02 x 1023 mongo seeds
Find: No. of mongo seeds
Solution: 1.709 x 1024 mongo seeds x
1 mole mongo seeds
6.02 x 1023 mọngo seeds
= 0.2839 x 10 24- 23= 1 mol mongo seeds
= 2.839 mol CO2
For you to have a feel on how it is being done, you may answer the following questions. You need to follow the two (2)
samples inorder to answer the questions accurately. Write your computations on the LAS.
1. How many bananas are equal to 9.75 moles of banana? 2. How many moles of tomatoes are in 5.01 x 1025 tomatoes?
tialen bouo different masses, Different substances
Transcribed Image Text:QUARTER 3, WEEKS 22 Get Informed (Explain) ana The collective counting words above (i.e. pair, tray, ream and case) are most often used on number of items in everyday life just as the grocery finds selling eggs by the dozen more convenient than selling them individual. All matter contain so many atoms so a unit of measurement for amount of substance called the mole (mol) has been established for use in counting atoms. A Mole (symbol: mol) is a number equal to the number of carbon atoms which is exactly 12 grams of pure Carbon – 12. It is the unit of measurement for amount of substances in the International System of Units (SI). Avogadro's Number (Na) is the number of particles in one mole of a substance which is equal to 6.02 x 1023 representative particles of that substance. Representative particles can either be atoms, molecules, or formula units. One mole of Carbon - 12 contains 6.02 x 1023 atoms for elements, molecules for covalent compounds and formula units 6.022x10 for ionic compounds. Examples: 1 mole of Sodium contains 6.02 x 1023 atoms of Sodium da 1 mole of sugar contains 6.02 x 1023 water molecules 1 mole of Silver chloride contains 6.02 x 1023 formula units of Silver chloride Avogadro's number = 6.02 x 1023 particles A mole = 602, 000, 000, 000, 000, 000, 000, 000 things Lorenzo Romano Amedeo Carlo Avogadro - an Italian scientist - The Avogadro's constant was named after him even though he was not the one who determined its value. = 602 hexillion Can you figure out how large Avogadro's number is, try to imagine this, "If you put together 6.02 x 1023 basketballs, it will be as big as the Earth or if you have 6.02 x 1023 rice grains, it would cover the land masses of the Earth to a depth of 75 meters or if you have 6.02 x 1023 doughnuts, you would reach the sun from the Earth and vice versa 200 billion Jean Baptiste Perrin - was a French physicist who first used the Avogadro's constant. Friedrich Wilhelm Ostwald was a Baltic German chemist and philosopher who first propounded the used of the term Mole as a times. standard unit of measurement of chemical substance in the year 1900. Mole Day is an unofficial holiday celebrated among chemists, chemistry students and chemistry enthusiasts on October 23, between 6:02 a.m. and 6:02 p.m. Now that you have recognized how big Avogadro's number is, let us try to think about the number of particles in a given sample. We will use the dimensional analysis approach to convert the number of moles to its equivalent amount in the number of particles. Sample Problem 1: How many molecules are there in 3.0 moles of CO2? Given: No. of moles = 3.0 moles CO2 Solution: 3.0 moles CO2 x 6.02 x 1023 molecules CO2 1 mole = 6.02 x 1023 molecules CO2 1 móle CO2 = 18.06 x 1023 molecules CO2 = 1.806 x 1024 molecules CO2 Find: No. of molecules CO2 Sample Problem 2: How many moles of mongo seeds are equal to 1.709 x 1024 mongo seeds? Given: No. of mongo seeds = 1.709 x 1024 mongo seeds 1 mole = 6.02 x 1023 mongo seeds Find: No. of mongo seeds Solution: 1.709 x 1024 mongo seeds x 1 mole mongo seeds 6.02 x 1023 mọngo seeds = 0.2839 x 10 24- 23= 1 mol mongo seeds = 2.839 mol CO2 For you to have a feel on how it is being done, you may answer the following questions. You need to follow the two (2) samples inorder to answer the questions accurately. Write your computations on the LAS. 1. How many bananas are equal to 9.75 moles of banana? 2. How many moles of tomatoes are in 5.01 x 1025 tomatoes? tialen bouo different masses, Different substances
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