BELLWORK: MAY (THE) 4 T H (BE WITH YOU)

• 4Al(s) + 3O2(g) —> 2Al2O3(s)

• What are your three mole ratios??

• How many moles of Aluminum are needed to form 6.2 moles of Al2O3?

• How many moles of Oxygen are needed to react with 11 moles of Aluminum?

S E RV I C E H O U R O P P O RT U N I T Y !

Babysitting at Heart of Mary!

When?: May 8th 6:15-10

Where? Heart of Mary School

See Miss Pahls to sign up!

U S I N G M O L E RAT I OS :I N T R OD U C T I ON T O S T O I C H I OM E T RY

M I S S PA H L S4 . 4 . 1 5

L E T S A D D S O M E C OM P L E X I T Y

• We can take this further by incorporating mass (since no lab measures amounts in terms of moles!)

• you ALREADY KNOW how to convert in this manner.

M A S S C OM P OUN D 1

M OLES C OM P OUN D 1

M OLES C OM P OUN D 2

M A S S C OM P OUN D 2

E X A M P L E

• 4Al(s) + 3O2(g) —> 2Al2O3(s)

• How many grams of Aluminum can react with 40.0 g of O2?

YO U T RY I T:

• 4Al(s) + 3O2(g) —> 2Al2O3(s)

• How many grams of Al2O3

are made when 50 g of Aluminum react with Oxygen gas?

A L I TT L E T O U G H E R:

• 4Al(s) + 3O2(g) —> 2Al2O3(s)

• How many grams of Al2O3

are produced when 205 g of Oxygen gas reacts with Aluminum?