Chemistry Answers

If 3.4 mol of HI was placed in a 2.0 L container and allowed to reach equilibrium, what would the equilibrium concentrations be for H2(g), I2(g) and HI(g) if the Ke = 49?	(5 marks)

H2(g) + I2(g) ⇆ 2HI(g)

In an experiment, 0.791 g of acetone reacts with 1.044 g of benzaldehyde to produce experimental 1.00 g of dibenzalacetone. Calculate the theoretical and percentage yield.

For 8-20 X-ray diffraction using Cu K, (-1.54 A) radiation from cubic crystals 3.5 A). How many diffraction peaks are in the 0°<20<90° range?. Give the index of the lattice for each diffraction peaks

What is the theoretical yield in g of AgaS produced from the reaction?

Calculate the value for the mass defect of a mole of the following:

a. Boron – 15 (isotopic mass = 15.031088 u)

b. Carbon – 14 (isotopic mass = 14.003241 u)

c. Nitrogen – 17 (isotopic mass = 17.008449 u)