Please help I’m doing a quiz right now How many atoms are in 21.26 grams of copper?

22

g Cu

contains

2.1

×

10

23

atoms of Cu.

Explanation:

In order to solve this problem, you need to determine the molar mass of copper, which is the mass of one mole of copper. The molar mass of copper is its atomic weight on the periodic table in g/mol, and is

63.546g/mol

. You also need to know that one mole of copper contains

6.022

×

10

23

atoms of copper. With this information you can solve this problem using dimensional analysis. You will convert given mass to moles, and moles to atoms.

22

g Cu

×

1

mol Cu

63.546

g Cu

×

6.022

×

10

23

atoms Cu

1

mol Cu

=

2.1

×

10

23

atoms Cu

The moles and grams cancel, leaving number of atoms.

22

g Cu

contains

2.1

×

10

23

atoms of Cu.

Explanation:

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?