Which one of the following has maximum number of atoms?

The number of protons, neutrons and electrons in ¹⁷⁵₇₁Lu, respectively, are :

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is :

A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. H₂SO₄ . The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be