To determine Avogadro's number, we need to identify the correct value representing the number of units in a mole of a substance. Avogadro's number is a fundamental constant in chemistry, which specifies how many atoms, molecules, or particles are present in one mole of a substance.
Let's analyze the given choices:
1. [tex]\( 3.01 \times 10^{23} \)[/tex]
2. [tex]\( 6.02 \times 10^{23} \)[/tex]
3. [tex]\( 1.20 \times 10^{24} \)[/tex]
4. [tex]\( 3.60 \times 10^{24} \)[/tex]
Avogadro's number is a well-known scientific constant and is commonly accepted to be approximately [tex]\( 6.02 \times 10^{23} \)[/tex]. This value indicates that one mole of any substance contains [tex]\( 6.02 \times 10^{23} \)[/tex] units (such as atoms, molecules, or ions).
Therefore, upon inspecting the given choices, we find that the correct value of Avogadro's number matches the second option, which is [tex]\( 6.02 \times 10^{23} \)[/tex].
Thus, Avogadro's number is:
[tex]\[ \boxed{6.02 \times 10^{23}} \][/tex] and this corresponds to option number 2.