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Report Sheet

Percent Water In Popcorn and Counting By Weighing

Revised by Dr. Walt Volland January 30, 2003

Percent Water In Popcorn return to procedure

 

Hook position for unpopped popcorn

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Known masses needed to match this hook position:

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 #nickels

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 #pennies

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  # pieces Al foil

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Hook position for popped popcorn

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Known masses needed to match this hook position:

 

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 #nickels

 

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 #pennies

 

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# pieces Al foil

 

 

 

 

 Mass of unpopped popcorn

 

 Mass of popped popcorn

 

 Mass of water lost

 

 % Water in popcorn

 

 

Counting By Weighing data report

 Hook position for 10 nickels

 

 Number of grains of rice = 10 nickels

 

 Mass of 10 nickels

 

 Mass of rice in Ziploc bag

 

Mass in grams of 1 grain of rice

 

Number of grains of rice in 28 grams of rice

 

 

Suppose you wanted to use 4000 grains of rice in a recipe. How would you measure out this amount of rice?

 

 

Suppose you want to use 0.35 moles of NaCl in a reaction. How would you measure out this amount of NaCl?