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Mole Concept Model

Mole Concept Model. Estimating # of Office SUpplies. Goals:. To use a linear relationship to estimate the # of a certain type of office supply when you know its mass. To apply this thinking to the mole concept

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Mole Concept Model

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  1. Mole Concept Model Estimating # of Office SUpplies

  2. Goals: • To use a linear relationship to estimate the # of a certain type of office supply when you know its mass. • To apply this thinking to the mole concept • See how small atoms are by comparing a mole of a common everyday object to a mole of atoms on the periodic table

  3. Introduction

  4. Precision & % Error • How well does your line represent the equation? • What value tells you this? • Precision or Accuracy? • Why isn’t your number exact? • What value tells you how off you were? • Precision or accuracy? • What does a + % error mean? • What does a - % error mean?

  5. Application • We do not use a line of best fit to convert from mass of an element to number of particles. • We use “the mole” because we can’t go directly from mass to number…. • Why can’t we go directly from mass to number?

  6. So then how big are atoms? • Mass of giant marshmallows: • This would be closest to a mole (6.02X1023 atoms) of: _____ • What would a mole of marshmallows weigh? • What planetary body is a mole of marshmallows closest to? • Jupiter 1.9 X 1027 kg • Earth 5.97 X 1024 kg • Moon 7.34 X 1022 kg

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