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Ch.1 - Chemical Tools: Experimentation & Measurement
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Capitolo 1, Problema 112a

A bag of Hershey's Kisses contains the following information:
Serving size: 9 pieces = 41 g
Calories per serving: 230
Total fat per serving: 13 g
(a) The bag contains 2.0 lbs of Hershey's Kisses. How many Kisses are in the bag?

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1
Convert the total weight of the bag from pounds to grams using the conversion factor: 1 lb = 453.592 g.
Calculate the total weight of the bag in grams by multiplying the weight in pounds by the conversion factor.
Determine the number of servings in the bag by dividing the total weight in grams by the serving size in grams (41 g).
Calculate the total number of Hershey's Kisses in the bag by multiplying the number of servings by the number of pieces per serving (9 pieces).
Ensure all units are consistent and check calculations for accuracy.

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Unit Conversion

Unit conversion is the process of converting a quantity expressed in one set of units to another. In this question, it is essential to convert the weight of the bag from pounds to grams, as the serving size is given in grams. Knowing that 1 pound equals approximately 453.592 grams allows for accurate calculations of the total weight in grams.
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01:56
Conversion Factors

Serving Size and Quantity Calculation

Understanding serving size is crucial for determining the total quantity of items in a package. In this case, the serving size of 9 pieces corresponds to 41 grams. By calculating how many servings are in the total weight of the bag, one can then multiply the number of servings by the number of pieces per serving to find the total number of Kisses.
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Stoichiometric Rate Calculations

Proportional Relationships

Proportional relationships involve understanding how two quantities relate to each other in a consistent manner. In this scenario, the relationship between the total weight of the bag and the number of Kisses can be expressed proportionally. By establishing the ratio of grams per serving to the total grams in the bag, one can derive the total number of Kisses effectively.
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Law of Multiple Proportions