1. a substance, a₂b, has the composition by mass of 60% a and 40% b. what is the composition of ab₂ by mass?

2. draw a reaction profile for reaction 2n2+o2+heat→2n2o, must include proper labels for each axis, reactants, products, indication for activation energy and transition state.

This may help you
Use an arbitrary mass, 100 g is an easy number to work with. 60% of 100 g is 60 g, there are two A's. Each A is 30 g 40 g is B, and there is only one, so B is 40 g. AB2, would have a mass of 30 g + 2*40 g = 110 g The new percent by mass composition of A is: 30g110g∗100%=27.3% The new percent by mass composition of B is: 80g110g∗100%=72.7%

Perimeter? wheres the answers