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The standard entropy of Pb(s) at 298.15k is 64.80 jk-1 mol-1. assume that the heat capacity of Pb(s) is given by Cp,m (Pb,l)/jk-1mol-1 = 32.51 -.00301 t/k. calculate the standard entropy of Pb (l) at 650 C. calculate delta H for the transformation Pb(s,25)---Pb (650 C)?.
The nitrate ion reaction is positive. In this case, is it accurate to state that nitrate ion was present in the original solution? Brie?y explain, referencing specific chemical reactions to support your explanation.
what is the total ionic equation for a reaction between a solution of sodium hydroxide naoh and a solution of
If 145 mL of 1.10 M KCl are diluted to 515 mL, what is the molarity of the final solution?
The relative abundances of the stable isotopes of the elements are not entirely constant. For example, in some geology samples (soils and rocks) the ratio of 87Sr to 86Sr is affected by the presence of a radioactive isotope of another element, whi..
In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the attractive force holding those ions together).
What weight of solid PbCl2 is formed when 225ml of a .2424M solution of sodium chloride is mixed with 225 ml of a .4242 M solution Pb(NO3)2
Do all ionic compounds dissolve in water, Do all covalent compounds dissolve in water? answer should be 50 to 100 words.
What volume of hydrogen gas is produced when 68.4 g of iron reacts completely according to the following reaction at 25 C and 1 atm iron (s) + hydrochloric acid (aq)--------- iron(II) chloride (aq) + hydrogen (g)
Calculate the vapor pressure (in torr) at 298 K in a solution prepared by dissolving 19.1 g of the non-volatile non-electrolye urea {CO(NH2)2} in 108 g of water.
1401g sample of a purified carbonate was dissolved in 50ml of a .1140 M HCl and boiled to eliminate CO2. Back titration of the excess HCl required 24.21ml of .09802M NaOH. Identify the carbonate.
Suppose that 1.02 of rubbing alcohol evaporates from a 75.0 aluminum block. If the aluminum block is initially at 25C, what is the final temperature of the block after the evaporation of the alcohol?
The formation constant of a complex ion [M(NH3)4]2+(aq) is 3.8E8. If a solution is prepared by adding 0.6 mol of [M(NH3)4]Cl2 to 275.0 mL of water, what is the equilibrium concentration of free M2+(aq) ions?
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