Chemistry Answers

Account for the ability of phosphorus to form five bonds, as in PF5.

Account for the ability of nitrogen to form four bonds, as in NH4+.

Normalize to 1 the molecular orbital ψ = ψA + λψB in terms of the parameter λ and the overlap integral S. Assume that ψA and ψB are normalized to 1.

Discuss the role of the Born–Oppenheimer approximation in the molecular-orbital calculation of a molecular potential energy curve or surface.

By applying solubility guidelines,state which of the following compounds will precipitate in water

1 cobalt (ll) hydroxide

2 sodium nitrate

3 Ammonium phosphate

4 potassium chloride

5 none of the above

what is the poh of a 7.2 x 10-8 m blood sample

how and why the decay of Uranium 238 and Technetium–99m are both considered spontaneous even though the time and rate of decay are different.

A 0.240g of a compound of oxygen and element X was found by analysis to contain 0.960g of X and 0.144g of oxygen

1. Calculate the percentage composition by weight

2. Calculate from the above data, three(3) possible weight for X relative to oxygen

NH4NO3(s) → N2O(g) + 2H2O(l)

In a certain experiment, 156 g of ammonium nitrate is decomposed. Find the mass of each of the products formed.

Calculate the concentration of urea (NH2CONH2) a non-electtrolyte that has an osmotic pressure of 30.0 atm at 293.15 K (Hint: Use 0.08206 as the value of R)