How many atoms are in 12.9 mol Au? Group of answer choices

a. 7.77x1024 atoms

b. 2.14x10-23 atoms

c. 6.02x1023 atoms

d. 1.38x1023 atoms

Given :

12.9 mol of Au.

To Find :

How many atoms are in 12.9 moles Au.

Solution :

We know, 1 mol of any element/molecules contains .

Number of atoms in 12.9 moles of Au is :

Therefore, number of atoms in 12.9 moles of Au is .

Hence, this is the required solution.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

16

explanation:

the marks go by 4s