Question

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.)?

Answer 1

Since the mass of a single popcorn kernel is not given, lets us assume that it is 1 gram

Now:

1 mole of popcorn kernels contain
`6.023 * 10^(23)` kernels

Since:

1 kernel weighs 1 gram

Then,

`1 mole = 6.023 *10^(23)` kernels would weigh
`6.023 * 10^(23)` grams

Answer 2

`m=7.0106x10^22g`

Step-by-step explanation:

Hello,

In this case we must take into account that the average mass of a dozen popcorn kernels is 1.416 g, therefore, the average mass of one popcorn kernel is:

`m=1.416g/12=0.118g`

Now, we also know that one mole of popcorn kernels has 6.022x10²³ popcorn kernels, therefore the mass of one mole of popcorn kernels is computed as shown below:

`m=1mol*(6.022x10^(23)popcorn \ kernels )/(1mol)*(0.118g)/(1popcorn\ kernels) \\m=7.0106x10^22g`

Best regards.