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Question:
(i) Differentiate between ionic, metallic, covalent and dipole-dipole bonds. Provide examples in each case.
(ii) With regard to electronic con?guration, what do all the elements in Group VII of the periodic table have in common?
(iii) Describe why hydrogen ?uoride (HF) has a higher boiling temperature than hydrogen chloride (HCl) (19.4ºC vs. - 85ºC), even though HF has a lower molecular weight.
(iv) On the basis of the hydrogen bond, explain the anomalous behaviour of water when it freezes. That is, why is there volume expansion upon solidi?cation?
(a) Copper has an atomic radius of 0.128 nm, a face-centered cubic crystal structure and an atomic weight of 63.5 g/mol. Compute
(i) the volume of a unit cell of copper
(ii) the atomic packing factor
(iii) the theoretical density of copper.
Explain the mixtures and compounds Mixture Compound 1. Mixtures are made from 2 or more substances which are not chemically co
chemical properties of formic acid
which type of nutrition does yeast have?
Assignment is diagonal between berilium and aluminium
a sample of CaCo3 and MgCo3 weighing 192g is ignited to constanr weight of 104 gm . what is the composition of mixture ?
P= 10.5atm v= 2.06L T= 298K p= 5.21atm v= 6.15 t= ? what is t?
name and chemical formula of blue vitriol
preparation of idoform in laboratery
Define the process of Metallization - fabrication processes It's the process of providing electrical connections between different parts of the circuit. Aluminium is common
Radius of the first Bohr's orbit of hydrogen atom is: (1)1.06 Å (2) 0.222 Å (3) 0.28 Å (4)0.53A Ans: 0.53 Å
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