A sample of an unknown pure substance X is analyzed and found to contain 7.47 g of Element E, 8.53 g of Element Ey, and no other elements. A similar analysis is made of three other substances that also only contain Elements E1 and E2. The results are shown in the table below. Decide whether each of the other substances is also a pure substance. If you don't have enough information to decide, choose can't decide. Substance Mass of E1 Mass of E2 Pure substanceA 21.0 g 6.0 g pure substance Mixture Can't decide B 13.8 g 18.2 g pure substance Mixture Can't decide C 19.6g 19.4 g pure substance Mixture Can't decide

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explanation:

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

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