10 10 Similar to the % labelling of oleum, a mixture of HPO4 and P400 is labelled as (100 + x) % where x is the maximum mass of water which can react with P400 present in 100 gm mixture of HPO4 and P4010. If such a mixture is labelled as 127 %. Mass of P4010 in 100 gm of mixture, is (a) 71 gm (d) 35 gm (b) 47 gm (c) 83 gm