Equality is for something to be equal to another thing.
This is a
redox reaction where oxidation and a reduction occur.
<span>Here, Mg goes to Mg²</span>⁺ <span>by changing
its oxidation
number from 0 to +2 while S goes
to S²</span>⁻ <span>by reducing its oxidation
state from 0 to -2 .
Hence Mg is
oxidized by S in the
reaction.</span>
Reducing agent <span>is a substance which reduces other
substance by oxidizing itself. Hence, the reducing
agent of this reaction
is <span>Magnesium.</span></span>
Answer: The motorcyclist traveled along a highway at 55 mph and reached the campsite in less than the two-hour estimated time.
Rocks are broken down over time.
Mass of erucic acid = 0.613 g
Mass of stearic acid = 8.115 g
Tf solution = 68.6°C
Tf solvent = 69.6°C
Kf = 4.5 °C / m
Δ Tf = Kf * m
where: ΔTf : freezing point depression
Kf : freezing point depression constant
m : molality of solution
ΔTf = Tf solvent - Tf soln = 69.6 - 68.6 =1°C
m = ΔTf / Kf = 1 / 4.5 = 0.22 molal
molality = number of moles of solute (n) / Mass of solvent (in kg)
number of moles = molality * mass of solvent (kg) = 0.22 * (8.115 * 10⁻³) = 1.8 x 10⁻³ mol
number of moles of solute = weight of solute (g) / Molar mass
Molar mass = weight (g) / n (moles) = 0.613 g / (1.8 x 10⁻³)
= 339 g / mol
so the correct answer is d)
