Design a Cu-Ni alloy that will exist at a completely molten state at 1300 oC and become completely solid at 1200 oC. (Indicate your design by specifying the weight fraction of Ni required). You will have one attempt to answer this question. Input your answer as a single number with no decimal points. For example if you choose a 5 weight percent Ni alloy your answer should be 5

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

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.