So your answer would pretty much be 2.80 x 10^24. The picture is just the explanation and how you would get that answer.
Answer:
a. KCl
Explanation:
a. KCl - made of 2 elements
b. NH4Cl
c. KClO3
d. NH4ClO3
A triple bonded carbon is called an alkyne. (with a y, e for double bond, a for single bond)
B) They have protons that are identical to the protons of all other elements
Most of the mass of an atom comes from the electron cloud would NOT describe the structure of an atom