Molecular crystals or metallic crystals
Classify the solid state of the following substances as ionic crystals, covalent crystals, molecular crystals or metallic crystals:
(a) CO2
(b) B12
(c) S8
(d) KBr
(e) Mg
(f) SiO2
(g) LiCl (h) Cr
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Exactly 10.0 mL of an unknown sample of Ni2+ gave a current of 2.36 ?A. After 0.500 mL solution of 0.0287 M Ni2+ was added to the 10.0 mL sample, the current increased to 3.79 ?A. What is the concentration of Ni2+ in the sample?
Calculate the concentrations of all species at equilibrium for each of the following cases.(a) 1.4 g H2O and 2.4 g Cl2O are mixed in a 1.0 L flask.
Examine the reaction you have written. What will be the effect of decreased pressure on the system on the concentrations of [O2] , [HbO2] and [Hb] in the blood
the explosive, TNT, is composed of 37.0% carbon, 2.2% hydrogen, 18.5% nitrogen and the rest oxygen. if the molar mass of TNT is 227 g/mol, what is the empirical and molecular formula for TNT?
A 67.0-g piece of gold at 725K is dropped into 165 g of H2O(l) at 298K in an insulated container at 1 bar pressure. Calculate the temperature of the system once equilibrium has been reached. Assume that Cp,m for Au and H2O is constant at its value
If a bottle of nail polish remover contains 158 of acetone, how much heat would be released by its complete combustion?
What is the molecular formula of a compound with a percentage composition 26.7% P, 12.1% N, and 61.2% Cl and a molecular mass of 695u.
Calculate the percentage of empty space in 1 mole of water at 25 c. obbtain the density from the experiment "some measurements of mass and volume." the volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen
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