a.) All the compunds are electrolytes, although not all of them are strong electrolytes. Compunds C and D are ionic and compund B is covalent.

b.) Nitrogen occurs in its highest possible oxidation state in compunds A and C; nitrogen occurs in its lowest oxidation state in compunds C,D, and E. The formal charge on both nitrogen in compund C is +1; the formal charge on the only nitrogen in compund B is 0.

c.) Compund A and E exist in solution. Both solutions give off gases. Comercially available concentrated solutions of compund A are normally 16 M. The commercial, concentrated solution of compound E is 15 M.

d) Commercial solutions of compund E are labeled witha misnomer that implies that a binary, gaseous compund of nitrogen and hydrogen reacted with watert to produce ammonium ions and hydroxide ions. Actually this reaction occurs to only a slight extent.

e) Compound D is 43.7% N and 50.0% O by mass.

f) A formula unit of compund C has one more oxygen than a formula unit of compound D. Compounds C and A have one ion in common when compound A is acting as the strong electrolyte.

g) Solutions of C are weakly acidic; solutions of compound A are strongly acidic; solutions of compound B and E are basic. The titration of .726 g of compound B requires 21.98 ml of 1.000 M HCl for complete neutralization.

These are the answers i have do far, if you have any input let me know
A) HNO3
B) NH2OH
C) ?
D) H2NO3
E) NH3

A is correct.
B is correct.
E is correct.
D is not correct. 43.7%N, 50.0%O, and 6.3%H gives H2NO.
C has one ion in common with A. Since A is HNO3, that makes D likely NH4NO3 since it contains N in it highest oxidation state (+5) AND in its lowest oxidation state (-3. Confirm with information from D. D has 1 less O per formula weight than C. Therefore, if C is NH4NO3, then D would be NH4NO2 and that would be N2H4O2 which is just twice the empirical formula of H2NO.
Case solved.

I made a typo in the above. "C has one ion in common with A. Since A is HNO3, that make C (should be C and not D)likely NH4NO3". D is NH4NO2 since it contains one less O per formula unit than C.

Thanks for the help

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In HNO3, the oxidation state of hydrogen is +1 and the oxidation state of oxygen is -2. Therefore, the oxidation state of nitrogen is

Above, D is incorrect. Use the density (2.86g/L) and multiply by its STP (22.4L). Multiply that number by each percent (43.7%, 50%, and 6.3%) to get a mass of each in grams. Divide by each's molecular weight to get the subscripts for the chemical compound. You should get N2H4O2 which translates to NH4 NO2.

No problem! It seems like you've made some progress in identifying the compounds based on the given information. Let's continue with the remaining questions:

C) Compound C has one ion in common with compound A when compound A is acting as a strong electrolyte. From the information given, we know that compound A is HNO3. So, compound C likely contains the nitrate ion (NO3-). Therefore, compound C is likely an ammonium compound, such as NH4NO3.

D) Compound D has one less oxygen per formula unit than compound C. We've already identified compound C as NH4NO3, so compound D should have a similar formula but with one less oxygen. Therefore, compound D is likely NH4NO2.

Now, let's move on to the remaining questions:

C) The compound E that exists in solution and gives off gas is likely ammonia, NH3. We can confirm this by using the mass percentages given. Compound D is 43.7% N and 50% O by mass. The remaining percentage should be hydrogen since the compound is NH3, which contains only N and H. Therefore, compound E is NH3.

F) A formula unit of compound C has one more oxygen than a formula unit of compound D. We've already determined that compound C is NH4NO3 and compound D is NH4NO2. The formula unit of NH4NO3 contains one more oxygen than the formula unit of NH4NO2.

G) Solutions of compound C are weakly acidic, solutions of compound A are strongly acidic, and solutions of compound B and E are basic. However, there is no information given about compound B being an acid. So, we cannot determine the answer to this question based on the given information.

I hope this helps you complete your answers. Let me know if you have any further questions or need clarification on anything!