Please help!! the question is below, send working out if possible :))

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

In which situation can a mixture always be called a solution

Stage in which a typical star has completely stopped fusion