problems & solution on trignometry

Problems - 7. 1.375 g of cupric oxide on reduction in hydrogen gas gives 1.098 g of copper. In another experiment, 1.179 g of metallic copper produced 1.476 g of copper oxide. Show that these results illustrate the law of constant proportio..

1.How many protons and neutrons are there in the following nucleus..

7. If the energy difference between the electronic states of hydrogen atom is 214.68 kJ mol - 1 , what will be the frequency of light emitted when the electron jumps from the higher to the lower energy state? (Planck's constant = 39.79 x 10 - 1 4 kJ mol - 1..

10. How many sublevels are possible in each energy leve..

9.(a) What are the permissible values for l and m when n = 3? (b) Which orbital is specified by l = 2 and n =..

12. Calculate the ionic character of HCl. Its measured dipole moment is 3.436 x 10 - 3 0 coulomb meter. The HCl bond length is 2.29 x 10 - 1 0 mete..

2. Show whether the formation of ionic bond in sodium chloride is favourable if the ionization potential of Na is 495.8 kJmol - 1 , the electron affinity of Cl is 349.4 kJmol - 1 and lattice energy is 776kJmol - 1..

3. Give the Lewis structures and empirical formulae for the ionic compound formed between the following pairs of elements : (i) Ba,Cl (ii) Na,S (iii) Mg,N (iv) Na,..

7. Identify the atoms which do not obey the octet rule in the following compounds and draw their Lewis structures? SO 2 or SF ..

9. Predict the shape of a molecule of beryllium chloride molecule following the VSEPR theor..