I. A 100 g sample o a gaseous compound ofboron and hydrogen occupies os20 Lat 1.

Question

I. A 100 g sample o a gaseous compound ofboron and hydrogen occupies os20 Lat 1.00 arm and 3 C. What could be the molecular fomula for the compound A) BiH B) BH C) B:H D BH E) BH, 2. An hydroxide is treated with 29,7 Lof dry hydrogen chloride gas measured at excess of sodium formed? STP, is the mass of sodium chloride A) 77.5 g B) 1.51 g c) 0.155 kg D) 14.9 g 1.74 kg 3. Complete the following reaction in aqueous solution and select the spectator ions, Fe NO C) Fe (aq), NO tag) 4 Using the information below, calculate AH for Pbos) 131.4 All for co:(g) -393.5 /mol Aur for CO(g) --110.5 kil/mol A) +252.1 J/mol D) -372.6 mol 5. ldentify the precipitate s formed (if any)in the following reaction in aqueous solution, FecNOo: A) Fe (CO B) Fecou(s) D) NH Noy(s) E) No precipitate will be observed

Explanation / Answer

i think that 1)C 2)A 3)D 4)E 5)C

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