GEN CHEM
Texto do Storyboard
- OKAY, CLASS! OUR TOPIC FOR TODAY IS THE RELATIONSHIP OF PERCENT COMPOSITION AND CHEMICAL FORMULA
- RELATIONSHIP OF PERCENT COMPOSITION AND CHEMICAL FORMULA
- MISS MARCELO, PLEASE STAND UP AND ANSWER THE QUESTION ON THE BOARD
- VERY GOOD, NOW LET'S DISCUSS THEIR RELATION
- WHAT IS PERCENT COMPOSITION?
- PERCENT COMPOSITION IS THE PERCENT BY MASS OF EACH ELEMENT IN A COMPUND.
- WHAT IS A CHEMICAL FORMULA?
- VERY GOOD, NOW MISS LIASON PLEASE EXPLAIN WHAT IS A CHEMICAL FORMULA
- WHAT IS A CHEMICAL FORMULA?
- IN CHEMISTRY, A CHEMICAL FORMULA IS A WAY OF PRESENTING INFORMATION ABOUT THE CHEMICAL PROPORTIONS OF ATOMS THAT CONSTITUTE A PARTICULAR CHEMICAL COMPOUND OR MOLECULE, USING CHEMICAL ELEMENT SYMBOLS, NUMBERS, AND SOMETIMES ALSO OTHER SYMBOLS, SUCH AS PARENTHESES, DASHES, BRACKETS, COMMAS AND PLUS AND MINUS SIGNS.
- HOW ARE THEY RELATED TO EACH OTHER?
- The percent composition of a compound can also be determined from the formula of the compound. The subscripts in the formula are first used to calculate the mass of each element in one mole of the compound. This is divided by the molar mass of the compound and multiplied by 100%.
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