What bond angles are observed in $NH_4^+$, $OH_2$, $OF_2$, and $H_3O^+$?

In the ammonium ion, ALL the hydrogen atoms are equivalent. A coordinate-covalent bond has formed between the nitrogen lone pair and a proton on the water molecule; of course we...

Ions of opposite charge will form an ionic bond. Since $"NH"_4^+"$ and $"Cl"^(-)"$ have opposite charges, they will combine through to produce the neutral ionic compound $"NH"_4"Cl"$, which is ammonium...

So this is a chromium(II) complex, and the counter ion is chloride. The water outside coordination sphere is along for the ride, and is properly described as a water of...

......And there are 2 double bonds around the central atom: $O=C=O$. And $OF_2$ is a bent molecule, with 2 lone pairs on the central oxygen atom; $/_F-O-F=103^@$.

Geometry of HOH => $AX_2E_2$ => Bent angular from an $AX_4$ Tetrahedral Parent. The 2 free pair repel the 2 bonded pair to compress the bond angle from $109^o$ in...

Indeed, oxygen can only bond with fluorine to form oxygen difluoride, $"OF"_2$. On the other hand, sulfur can easily form sulfur difluoride, $"SF"_2$, sulfur tetrafluoride, $"SF"_4$, and sulfur hexafluoride,...

Oxidation state is the charge left on the central atom, when all the pairs of electrons are removed from the central atom, with the charge assigned to the most electronegative...

Mass of one mole of Ammonium Sulfate is 132 g We can set up conversion factors/ ratios 1 mol Ammonium Sulfate = 132g of $ (N$H4$)_2$S$O_4$ 1 mol Ammonium Sulfate...

Where $N_A="Avogadro's number"$ $=$ $6.022xx10^23*mol^-1$ $"Number of moles"$ $=$ $"Mass"/"Molar mass"$ $=$ $(27*g)/(54.00*g*mol^-1)=0.500*mol$ And thus $"Number of molecules"$ $=$ $6.022xx10^23*mol^-1$ $=$ $3.011xx10^23$ $OF_2$ molecules.......... What is the oxdation number of...

You have a $0.100$ $mol$ quantity. $0.100$ $cancel(mol)$ $xx$ $132.14$ $g*cancel(mol^-1)$ $=$ $??$ $g$.