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CHEMISTRY

CHEMISTRY. The good news and the bad news. CHEMISTRY. It’s all about building blocks. COMPOUNDS. Hydrogen. Compounds are two or more elements that share electrons or have taken or given electrons away. Carbon-6. Hydrogen. Hydrogen. Hydrogen.

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CHEMISTRY

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  1. CHEMISTRY The good news and the bad news

  2. CHEMISTRY It’s all aboutbuilding blocks

  3. COMPOUNDS Hydrogen Compounds are two or more elements that share electrons or have taken or given electrons away. Carbon-6 Hydrogen Hydrogen Hydrogen

  4. Atoms combine to form compounds in simple ratios, such as 1:1, 1:2, 2:2, 1:3, and so forth.

  5. Chemical Equations are simple. 2H2 + O2 2H2O

  6. Ba(OH)2.8H2O(s ) + 2 NH4SCN(s ) --> Ba(SCN)2(s ) + 10 H2O(l ) + 2 NH3(g ) O Ba O O Ca S O O H H O Ba(OH)2(aq)+ CaSO4(aq) BaSO4(s) + Ca(OH)2(aq)

  7. Good news: Your car rolled off the pier but didn’t fall into the water. Bad news: The damage to the yacht is more than the value of the car.

  8. Bad News #1: ATOMS ARE TOO SMALL TO COUNT

  9. Imagine counting grains of sand. Not easy but not impossible. Now imagine trying to count grains of sand that are 2,000 miles away. Quite impossible even with the world’s best telescope. Well this is the challenge in counting atoms. Counting atoms from 1 foot away is the same as counting grains of sand 2,000 miles away.

  10. Bad News #2: COUNTING ENOUGH ATOMS IS IMPOSSIBLE

  11. Chemical Equations are simple. 2H2 + O2 2H2O Chemical equations are quite easy. Here we count out 4 hydrogens and 2 oxygen atoms and we can make two water molecules. But how many hydrogens and oxygens would we count out to make enough water to fill a one liter bottle of water?

  12. Imagine the number of grains of sand in a handful of sand: thousands or maybe a million? It would be difficult to count that many. Now imagine the number of grains of sand that would be present if we covered all of the Earth (land and sea) 10 miles deep of sand. That number of grains of sands is the same number of water molecules needed to fill a 1 liter bottle.

  13. Art of Counting Without Counting

  14. COUNTING COINS WITHOUT COUNTING

  15. Periodic Table of the Elements The numbers under the element names are the relative weights. However, if you consider one mole of the element (6 x 1023 atoms) then these numbers are read as grams.

  16. Count Grams Bridge between mass and number MOLE

  17. VOLUME

  18. COUNTING ATOMS IN GASES

  19. Gas Volume

  20. PRESSURE

  21. TEMPERATURE

  22. Art of Counting Without Counting MASS VOLUME PRESSURE TEMPERATURE

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