Answer: The moles of melatonin are 0.000043
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number
of particles.
To calculate the moles, we use the equation:

Given mass of melatonin = 0.01 g
Molar mass of melatonin
= 232.28 g/mol

Thus the moles of melatonin in 0.01 g are 0.000043
Answer: strong nuclear forces and electrostatic forces of repulsion
Explanation:
The statement "<span>All gaseous mixtures are solutions." is true. This is because there are a number of gaseous molecules present in a volume of gas and they are considered solutions.</span>
Electromagnetic consists of both electrical and magnetic fields so D. :)