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The Mole

The Mole . Assigning numbers to the masses of chemical elements allowed chemistry to develop into a physical science and allowed for relationships between products and reactants One mole of a substance contains 6.02x 10^23 particles This number is Avogadro’s constant. Questions.

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The Mole

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  1. The Mole • Assigningnumberstothemasses of chemicalelementsallowedchemistrytodevelopinto a physicalscience and allowedforrelationshipsbetweenproducts and reactants • One mole of a substancecontains 6.02x 10^23 particles • ThisnumberisAvogadro’sconstant

  2. Questions • Howmanymoleculesare there in 2g of hydrogen ? • 8g of oxygen ? • Atoms in 36g of carbon ? • Whatisthemass of 4 mol. of hydrogenatoms? • 1 mol. of methanemolecules ?

  3. Questions • Howmanyatoms are there in 30.97g of phosphorus ? • Whatisthemass (to 2 dec. places) of 1 mol. of magnesiumhydroxide ? • Whatisthemass of 0.0100 mol. of caffeine, C8H902N4 ? • Howmany moles of ammonia are there in 28.08g

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