Antimony (Sb), which has an atomic weight of 121.75 amu, has two naturally occuring isotopes: Sb-121 and Sb-123. If a sample antimony is 42.70% Sb-123, which has a mass of 122.90 …

Oct 31, 2009 · Find the heat capacity of the bomb calorimeter. I have found a supposed solution that says to divide the energy of the combustion by the temperature change, but that gives an …

I'm trying to add up this equation and I'm not getting the answer posted in the book. The problem is to calculate the [delta]H lattice of NaCl. [delta]H1 = 109 kJ [delta]H2 = 243 [delta]H3 = 496 …

Find the molarity of the resulting mixture when two solutions of different molarity mixed togather and volume are additive

I would appreciate any help you could give me on this problem...thanks!! :) 6. Calculate the analytical concentration of a sodium acetate solution prepared by diluting 45.0 mL of a solution …

So to find the mass of Ir in the unit cell, we need to find the mass of an Ir atom (in grams) and multiply it by eight. 1 atom x (192.2.0 g / 6.02 x 10^23 atoms = mass of 1 Ir atom in grams …

delta [Br2] / delta t = -1/2 delta [HBr] / delta t = y/2 M/s now to find the number of moles of Br2 for part c; rate of formation of Br2 = moles of Br2/ volume* delta t delta t and volume is given to …

1) write formulas for a) elemental aluminum Al b) elemental iodine I2 c) aluminum iodine AlI3 2) write a balanced equation Al + 3I2 --> 2 (AlI3) 3) how many moles were mixed? moles …

Assume that the density and heat capacity of the solutions is the same as that of water. So the balanced equation is AgNO3 + NaCl YIELDS AgCl + NaNO3 and I know how to find the …

Submitted by saryne on Sat, 07/04/2009 - 20:10 sodium benzoate , a salt of benzoic acid sometimes used as a preservative, dissolves in H2O to produce benzoate ion (C6H5CO2-). …