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What is the heat change in J associated with 74 g of gaseous butane at 91 oC changing to solid at -170 oC? c(butane) (gas) = 2.31 J/ (g.K) c(butane) (liq) = 1.65 J/(g.K) c(butane) (s) = 1.32 J/ (g.K) ?Hfus(butane) = 6.885 kJ/mol ?Hvap(butane) = 21.0 kJ/mol The freezing point of butane is -138 oC. The boiling point of butane is 0 oC.
Gold has a density of 19.3g/ml .suppose you have 100.0 glonkins of gold., what volume in liters will the gold occupy.
In the reaction BaCO3 + 2HNO3 -> Ba(NO3)2+CO2+H2O, what mass of Ba(NO3)2 can be formed by combining 55g BaCO3 and 26g HNO3?
Calculate the amount of energy in kilojoules needed to change 117g of water ice at -10degrees Celcius to steam at 125 degrees Celcius
The standard cell potential (Ecell) of the zinc-air battery is 1.65V. If at 25 degrees celcius the partial pressure of oxygen in the iar diffusing through its cathode is 0.22atm, what is the cell potential (Ecell)? Assume the cell reaction is:
A 309 mL sample of unknown HCl solution reacts completely with Na_2CO_3 to form 10.1 g CO_2. What was the concentration of the HCl solution?
A .499 mol sample of graphite was heated with 2.16 mol oxygen gas to form carbon dioxide. Graphite is the limiting reagent in this reaction. Calculate the total moles of gas present after the reaction?
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol. 2. Write the reaction of the sodium salt of para red when treated with 1 M H2SO4. Why does a precipitate form?
What volume of a 0.50 M KOH solution is needed to neutralize completely 10.00 mL of a 0.30 M H2SO4 solution? The neutralization reaction is 2KOH + H2SO4 → K2SO4 + 2H2O.
calculate the pH formed by mixing 100 mL of 0.20 M HCL with 50 mL of 0.30 M NaOH.
The fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6 C The specific heats of C2Cl3F3(l) and C2Cl3F3(g) are 0.91 J/g-K and 0.67 J/g-K, respectively.
A 1.0 L buffer solution is 0.250 M LiC2H3O2 and 0.050 M HC2H3O2 . Which of the actions will destroy the buffer? (a)adding 0.050 moles of LiC2H3O2(b)adding 0.050 moles of HCl(c)adding 0.050 moles of HC2H3O2(d)adding 0.050 moles of NaOH.
If 3.00 moles of ZnS are combined with 4.00 moles of O2, how many moles of ZnO can be produced?
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