Look at the periodic table to find the charge on atoms.
Magnesium is +2 and Nitrogen is -3. Since there are two nitrogen charge 2*-3 = -6 there needs to be 3 Mg then (3*2+ = 6+) to pair with the two nitrogen.
3 Mg(+2) + 2 N(-3) = Mg3N2
Avogadros number is the answer
Answer:
True.
Explanation:
Dissolution changes the properties of molecules or atom.
Explanation:
It is known that density is mass of a substance divided by its volume.
Mathematically, Density = 
Therefore, calculate the mass of cyclohexane as follows.
mass of cyclohexane = Density × volume
=
= 15.58 g
or, = 0.01558 kg (as 1 kg = 1000 g)
As, K_{f} of cyclohexane =
molality =
= 0.26 m
Also, molality is the number of moles of solute present in kg of solvent.
Mathematically, molality =
0.26 =
No. of moles =
As, No. of moles =
molar mass = 87.0 g/mol
Thus, we can conclude that molar mass of unknown substance is 87.0 g/mole.
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