Answer : If in any reaction ΔH(fusion) is given we can consider its units;
ΔH(transition) has units (KJ/mol) and mass and molecular mass of that compound has unit mol/g and g respectively.
When we solved this, we get the units as KJ/mol which satifies the equation value for q.
So, q=n X ΔH (transition);
Hence, to find the mass of solid we can use the above equation.
Because it has atomic no. = 1 (according to modern periidic table)
