How can derivatives relation between relative lovering of vapour pressure and molality?

A saturared solution of XCl3 has a vapour pressure 17.20 mm Hg at 20°C, while pure water vapour pressure is 17.25 mm Hg. Solubility product (Ksp) of XCl3 at 20°C is

Why the C-C bond length in graphite is shorter than C-C bond length of diamond?

Graphite has carbon in sp2 hybrid state (33.3 % s character) but diamond has carbon in sp3 hybrid state (25 % s characrer). More is the percentage of s characters, (by Bent rule) more is the bond multiplicity and hence, shorter the bond is. Thus carbon-carban bond in graphite has double bond character but has a single bond character in diamond. Hence, C-C bond length in graphite is shorter than than in diamond.

Related Questions:

Is all the C-C bond length in fullerene is equal ?

Why CO2 is a gas, but SiO2 is a high melting solid?.

CCl4 can not be hydrolysed but SiCl4 can be. Why?

Why the C-C bond length in graphite is shorter than C-C bond length of diamond?

How many six membered ( hexagons) and five membered (Pentagons) carbon ring present in (C60) fullerene ?.

What are the SESQUI OXIDES ? give the examples.

Arrange in increasing order of extent of hydrolysis [ CCI4, MgCI2, AICI3, PCl5, SiCI4].

Although Sulphur contain vacant d-orbital but SF6 does not under go hydrolysis. Why ?

CCl4 can not be hydrolysed but SiCl4 can be. Why?

Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

What happened when Graphite treated concentrated acids like HNO3/HF or KMnO4 ?.

Why Boric acid become strong acid in the presence of cis 1,2-diol or 1,3-diol ?What is the molecular formula of Borax ?

What is oil of vitriol ?

Silianol (SiH3OH) is more acidic than methanol (CH3OH) why?

We know that acidic strength of an acid also depend upon stability of its conjugate base. So silianol is more acidic than methanol (H₃C-OH) because conjugate base silianol (H₃Si-OH) stablised by dispersal of negative charge in H₃Si-O- ion by 2pπ—3dπ back bonding

Hence methanol is less acidic than silianol.

For more detail on Back bonding click here

Why Bond angle of NF3(102 degree) is lesser than in NH3 (107) ? explaine.

Bond angle of NF₃(102 degree) is lesser than in NH3 (107) as per VSEPR theory which suggests that in case of less electronegative terminal atoms like H, Bond pairs would be closer to more electronegative central atom, N and hence bonds open up due to repulsion between  bond pairs electron density in vicinity. But bond angle of PF₃(100) is greater than PH₃, its due to possibility of back bonding in PF₃ between lone pair of fluorine and vacant d-orbital of phosphorous (2pπ-3dπ) hence forth P-F bond acquires partial double character and we know well that multiple bonds causes more repulsion so bond angle is greater.