Presentation on theme: "Daily EQ: Test 3/14/11 So because I am so nice, we will have a PBO for this past test. Opportunities are Tuesday 3:45 pm Wednesday 8:15 and 3:45pm Thursday."— Presentation transcript:
Daily EQ: Test 3/14/11 So because I am so nice, we will have a PBO for this past test. Opportunities are Tuesday 3:45 pm Wednesday 8:15 and 3:45pm Thursday 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? 3/14/11 Measure things in 3 ways mass, count, volume Ex. Soda – six-pack or 2 L Ex. Apples - Store by mass/weight $1.29 per lb Road side by count – 3 for $2.40 Orchard by volume $12.00/bushel
Mole Mole – contains Avagadro’s number of representative particles 6.02 X 10 23 = Avagadro’s number This a huge, huge quantity Ex. 1 mole of pennies could be distributed to all the currently-living people of the world so that they could spend a million dollars per hour every hour (day and night) for the rest of their lives.
representative particles 3/14/11 representative particle can be : atom – single element (Fe atoms, N atoms) molecules – molecular compound (H 2 0, CO 2 ) formula unit (FU) – ionic compound (CaO) ion – ion (Ca 2+ )
How big is a mole? 3/15/11 Let’s share examples Paper clip lab You need a ruler and a small paper clip please do not destroy clip please do not destroy clip
Mole Why does the mole have to be such a huge quantity? Molar mass - Molar volume - the 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 live 3/16/11 Warm-up What is the number of Fe atoms in 2.5 moles? How many moles of H 2 0 in 3.6 X10 24 molecules? How many liters of gas @STP are in 4 moles?
Homework3/11/10 Read and take notes Chapter 10 p287 by Monday Answer question 26-31 p 303 on notebook paper by tomorrow Read Section 16.2 p480 and take notes Answer questions 8,9 on p481 Due tomorrow 10,11 on p 482
Ticket out the Door 3/17/11 Calculate the molar mass of the following 1) CaCO 3 2) N 2 O 4 3) Sn 3 (PO 4 ) 2 4)How many molecules of Zinc oxide are in 250.0 grams of Zinc oxide?
Percent composition 3/18/11 Warm-up What is percent composition? What is the percent composition of calcium in calcium carbonate? What is the % composition of Copper in Copper (I) sulfate?