Inorganic Chemistry Answers

Calculate the molarity of a concentrated H2SO4 solution of density 1.84 g/ml and
containing 98.0 % H2SO4 solute by mass

Is lead (II) iodide more or less soluble in a solution of 0.1M NaI than it is in pure water?

Two pure gases of elemental composition X and Y are allowed to mix in a
chamber. When combined, these two gases produce a liquid with the
chemical formula XY2. Interestingly, the liquid product has no discernible
smell, but the two precursor gases do! Gas X smells like flowers, while gas Y
smells like fish. In one experiment, 21.3 grams of X is mixed with 4.53
grams of Y and 23.97 grams of the product is obtained. The headspace, the
gas above the liquid in the chamber, smelled like roses. How much of gas Y
will be needed for the exclusive formation liquid XY2 (no smells in the
headspace) if the experiment starts with 16g of gas X?

The atomic number of an element X is 14 and it’s mass number is 25. How many neutrons does X contain and will X react in a covalent or electrovalent manner

The ligand N(Ch2Ch2Nh2)3 is ?

1) Bidentate
2) tridentate
3) tetradentate
4) pentadentate

Na2b4o7 + X = H3BO3 what is X in this reaction ?
1) aq. Solution of Naoh
2) Dil. Hno3
3) Conc . H2so4
4) water

Given the following reaction:
Cu+2AgNO3=2Ag+Cu(NO3)2
How many moles of zag will be produced from 46.0 g of Cu, assuming AgNO3 is available in excess?

30cm³ of a gaseous hydrocarbon X was mixed with 140cm³ of excess oxygen and exploded. After cooling to room temperature, the residual gas occupied 95cm³. On absorption with potassium hydroxide solution, a reduction of 60cm³ was observed and the remaining gas was to be oxygen. Determine the molecular formula of the hydrocarbon.

When compounds of barium are heated in a flame, green light of wavelength 554 nm is emitted. How much energy is lost when one mole of barium atoms each emit one photon of this wavelength?

Question:

During electrolysis 0.02 moles moles of metal X is deposited on cathode when 0.12 moles of e- are passed through molten chloride of X. What is the formula of the chloride?

I have tried solving it and my answer is XCl6 which is incorrect. The correct answer given is XCl3. In the explanation the book says that 0.06 moles of e- have flown to cathode and goes on to divide the no. of moles of e- at cathode by no. of moles metal X (0.06/0.02) so it's 3 which means 1 atom of X gains 3 e-'s, giving X +3 charge. What I do not get is what about the other 0.06 mole of e-'s. Isn't metal X supposed to gain all of the 0.12 mole of e-'s ? Shouldn't cathode have the total 0.12 mole of e-'s?



Your answers and explanations will help me a lot, thanks.