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  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.

Verified Answer :

Nirina7

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%

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