How many atoms are found in a 15.5 g sample of bismuth?

4.47 x 10²² atoms

Explanation:

Given parameters:

Mass of Bismuth  = 15.5g

Unknown:

Number of atoms  = ?

Solution:

To find the number atoms, first solve for the number of moles in this element first.

  Number of moles  =    

  Number of moles  =    = 0.074mole

So:

        1 mole of a substance contains 6.02 x 10²³ atoms

     0.074 mole of Bismuth will contain 0.074 x 6.02 x 10²³ atoms

                                                          = 4.47 x 10²² atoms

1.) Basic

2.) Basic

3.) Neutral

4.) Acid

5.) Basic

6.) Neutral

7.) Acid

Explanation:

Acidic Solutions:

Red litmus paper = stays red

Blue litmus paper = turns red

Neutral Solutions:

Red litmus paper = stays red

Blue litmus paper = stays blue

Alkaline/Basic Solutions:

Red litmus paper = turns blue

Blue litmus paper = stays blue