The number of molecules : 4.967 x 10²⁴
<h3>Further explanation
</h3>
A mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
8.25 moles of C₈H₁₈
The number of molecules :

Polylactic acid is the correct answer
Answer:
72N
Explanation:
Force = mass × acceleration
= 12 × 6
= 72N
.. it’s the answer 0.25 g MgSO4? ..
I may be wrong.