Daily EQ: Test Daily EQ: Test

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So because I am so nice, we will have a PBO So because I am so nice, we will have a PBO for this past test.for this past test.

Opportunities are Tuesday 3:45 pmOpportunities are Tuesday 3:45 pm

Wednesday 8:15 and 3:45pmWednesday 8:15 and 3:45pm

Thursday 8:15Thursday 8:15

1. What is the next symbol in this sequence?

2. Several cells or halves of them in a 6x8 grid are shaded as shown in the illustration. The object is to discover what message is hidden in it?

Daily EQ:What is a mole?Daily EQ:What is a mole?

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Measure things in 3 waysMeasure things in 3 ways

mass, count, volumemass, count, volume

Ex. Soda – six-pack or 2 LEx. Soda – six-pack or 2 L

Ex. Apples - Ex. Apples - Store by mass/weight $1.29 per lbRoad side by count – 3 for $2.40Orchard by volume $12.00/bushel

MoleMole

Mole – contains Avagadro’s number of Mole – contains Avagadro’s number of representative particlesrepresentative particles

6.02 X 10 6.02 X 10 23 23 = Avagadro’s number = Avagadro’s number

This a huge, huge quantityThis a huge, huge quantityEx. Ex. 1 mole of pennies could be distributed to all the 1 mole of pennies could be distributed to all the

currently-living people of the world so that they currently-living people of the world so that they could spend a million dollars per hour every hour could spend a million dollars per hour every hour (day and night) for the rest of their lives.(day and night) for the rest of their lives.

representative particlesrepresentative particles

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representative particle can be :representative particle can be :

atom – single element (Fe atoms, N atoms)atom – single element (Fe atoms, N atoms)

molecules – molecular compound (Hmolecules – molecular compound (H220, CO0, CO22))

formula unit (FU) – ionic compound (CaO)formula unit (FU) – ionic compound (CaO)

ion – ion (Ca ion – ion (Ca 2+2+))

How big is a mole?How big is a mole?

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Let’s share examplesLet’s share examples

Paper clip labPaper clip lab

You need a ruler and a small paper clipYou need a ruler and a small paper clip

please do not destroy clipplease do not destroy clip

MoleMole

Why does the mole have to be such a huge Why does the mole have to be such a huge quantity?quantity?

Molar mass - Molar mass -

Molar volume - Molar volume -

the mass of one mole of substancethe mass of one mole of substance

The volume of one mole = to 22.4 L of gas at STP

STP = standard temperature and pressure

273 kelvin and 1 atmosphere

Moleville: top places to liveMoleville: top places to live

3/16/11 Warm-up3/16/11 Warm-up

What is the number of Fe atoms in 2.5 moles?What is the number of Fe atoms in 2.5 moles?

How many moles of HHow many moles of H220 in 3.6 X100 in 3.6 X1024 24

molecules?molecules?

How many liters of gas @STP are in 4 moles?How many liters of gas @STP are in 4 moles?

Mole Road Map Mole Road Map

f

ville

HomeworkHomework

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Read and take notes Chapter 10 p287 by Read and take notes Chapter 10 p287 by MondayMonday

Answer question 26-31 p 303 on notebook Answer question 26-31 p 303 on notebook paper by tomorrowpaper by tomorrow

Read Section 16.2 p480 and take notesRead Section 16.2 p480 and take notes

Answer questions 8,9 on p481Answer questions 8,9 on p481

Due tomorrow 10,11 on p 482Due tomorrow 10,11 on p 482

Ticket out the DoorTicket out the Door

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Calculate the molar mass of the followingCalculate the molar mass of the following

1) CaCO1) CaCO33 2) N2) N22OO44

3) Sn3) Sn33(PO(PO44))22

4)How many molecules of Zinc oxide are in 4)How many molecules of Zinc oxide are in 250.0 grams of Zinc oxide?250.0 grams of Zinc oxide?

Percent compositionPercent composition

3/18/11 Warm-up3/18/11 Warm-up

What is percent composition?What is percent composition?

What is the percent composition of calcium in What is the percent composition of calcium in calcium carbonate?calcium carbonate?

What is the % composition of Copper in What is the % composition of Copper in Copper (I) sulfate?Copper (I) sulfate?