The Mole And Avogadro’s Number

Question 1

These are exceedingly small.

Answer 1

atoms

Question 2

It is more convenient to talk about __(1)__of atoms, and for this reason, scientists use the __(2)__.

Answer 2

larger quantities

mole

Question 3

A ____ defines a quantity, much like a dozen items means 12, and a case of soda means 24 cans. The only difference is that a ___ is much larger.

Answer 3

mole

Question 4

A mole is a quantity that contains ____ usually atoms, molecules,or ions.

Answer 4

6.02 ×10^23 items

Question 5

The definition of a mole is based on the:

Answer 5

number of atoms contained in exactly 12 g of the carbon-12 isotope

Question 6

Who proposed the concept of a mole?

Answer 6

Amadeo Avogadro

Question 7

When did the scientist propose the concept of a mole?

Answer 7

Nineteenth century

Question 8

One mole, abbreviated as ___, always contains an _____.

Answer 8

mol

Avogadro’s number of particles

Question 9

Example:

1mole of C atoms=
1 mole of H2O molecules =
1 mole of vitamin C molecules =

Answer 9

6.02 x 10^23 C atoms

6.02 x 10^23 H2O molecules

6.02 × 10^23 vitamin C molecules

Question 10

We can use ____ as a conversion factor to relate the _____ to the _____ it contains (3)

Answer 10

Avogadro’s number

number of moles of substance

number of atoms or molecules

Question 11

Refer to card 10:

These conversion factors allow us to determine how many atoms or molecules are contained in a given number of ____.

Answer 11

moles

Question 12

To multiply two numbers in scientific notation, multiply the ___ together and add the ___ in the powers of 10.

Answer 12

coefficients

exponents

Question 13

To divide two numbers in scientific notation, divide the ___ and subtract the _____ in the powers of 10.

Answer 13

coefficients

exponents