Using Avogadro\'s number, 6.02???10 23 things/mole, answer the following questio

Question

Using Avogadro's number, 6.02???1023 things/mole, answer the following questions. (Use scientific notation for large answers.)

Mass of 1 popcorn kernel: 0.1560 g

Mass of 1 marble: 3.6400 g

Mass of 1 dozen popcorn kernals: 1.872 g

Mass of 1 dozen marbles: 43.680 g

1. What is the mass of one mole of popcorn kernels? (Sig Fig Hint: Consider the precision of Avogadro's number to determine the correct number of sig figs.)


2. What is the mass of one mole of marbles? (Sig Fig Hint: Consider the precision of Avogadro's number to determine the correct number of sig figs.)


3. What is the relative mass of one mole of marbles to one mole of popcorn kernels?

Explanation / Answer

No=6.02x10^23= Avogadro's no = no. of any particle in one mole

1. Mass of 1 popcorn kernel: 0.1560 g

Mass of 1 mole of popcorn kernel = 6.02 x10^23 x 0.156g = 9.3912 x10^22g = 9.4 x10^19 kg

2.Mass of 1 marble: 3.6400 g

Mass of 1 mole of marble = 3.6400 g x6.02x10^23 =2.1913 x10^24g= 2.2 x 10^21 kg

3.Relative mass of one mole of marbles to one mole of popcorn kernels= m mole of marble / m moles of kernals=

2.2 x10^21 / 9.4 x10^19 =23.4

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