mole

MOLE

MODULE 3 LESSON 1

​Today we wil

• Describe what is a mole

• Determine the atomic mass of a given compound

• Calculate the molar mass using the given formulas​

ESSENTIAL QUESTION

How are particles counted using a mole?

Open Ended

How many COKE KASALO does it need to fill up this container?

​QUESTION:

​1.    How did you come up with your answers?

​

2.    How do we determine the “amount” of material in a specific container?

​Many objects come in various counting units. Shoes, gloves, stockings, and earrings are sold in pairs; eggs and donuts in dozens, and thumbtacks and pins by boxes. What about atoms. Molecules, ions and other elementary entities? They are measured by moles

​MOLE

• A sample of ​ any element with a mass equal to that element's atomic weight in grams will contain precisely one mole of atoms (6.02 x 10^23) ​

• one mole of any substance always contains the same number of particles as one moles of any atom

Amadeo Avogadro

​He is rich aristocrat in Italy. He briefly worked as a lawyer, but soon turned to studying science.

​

​Amadeo Avogadro first proposed that the volume of a gas at a given pressure and temperature is proportional to the number of atoms or molecules, regardless of the type of gas. Although he did not determine the exact proportion, he is credited for the idea.

​ATOMIC MASS AND MOLAR MASS

Multiple Choice

What is the atomic weight of the element?

• 42

• 95.96

• 53.96

Multiple Choice

what is the atomic mass of Ra?

• 88 amu

• 88 g/mol

• 226.0254 g/mol

• 226.0254 amu

Multiple Choice

what is the molar mass of Tc?

• 97.907 amu

• 43 g/mol

• 97.907 g/mol

• 43 amu

​How to get the MASS per ATOM

​

​In this example we use the element Ag (Silver), which has a molar mass of 108 g/mol. Now determine the MASS per atom of the element

Draw

mass per atom of Cd?

Multiple Choice

Mass per atom of Tl?

• 3.40x10^22 g/atom

• 3.40x10^-23 g/atom

• 3.40x10^24 g/atom

• 3.40x10^-22 g/atom

​MOLECULAR AND FORMULA MASS

Draw

Find the Formula Mass: Al2Cl3

g/molecule or g/formula

Open Ended

Al2Cl3 of g/molecule

​mass to mole conversion

Multiple Choice

How many moles are there in 30g of carbon atom?

• 2.50 mol

• 360.3 mol

• 250 amu

• 2.50 g/mol

​try this!

Convert this to MOLES

99g of Carbon Dioxide

Open Ended

How are particles counted using a mole?

seatwork #4

​refer to silid to answer it <3