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Which of the following chemical equations corresponds to the standard molar enthalpy of formation of N2O?
A. NO + 1/2N2---> N2OB. N2 + 1/2O2---> N2OC. 2N + O ---> N2OD. N2 + O ---> N20E. 2N2 + O2 ---> 2N2O
The reversible chemical reaction A+B C+D with an equilibrium constant of K 7.1.Initially, only A and B are present, each at 2.00 . What is the final concentration of once equilibrium is reached?
What is the molarity of the carbonate ion in sodium carbonate, Na2CO3, prepared by dissolving 3.5 g of sodium carbonate in enough water to form 0.800 L of solution?
Write the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. Write noreaction if no insoluble salt forms KCl(aq)+Pb(NO3)2(aq)
an unknown gas sample is collected in a 255 ml countainer at 25c and 755 mm hg. how many moles of gas are present?
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
If the balloon rises to an altitude at which the temperature is -2.8°C and the pressure is 0.068 atm, what will the volume of the balloon be?
A bottle of nail polish remover contains 182 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788mL.
if .025 grams of Pb(NO3)2 is dissolved in 100. grams of H2O, what is the concentration of the resulting solution in parts per million?
heat of solution of lithium carbonate is -3.06 kJ/mol solute in 200 moles H2O. What effect would you expect increased temperature to have on the concentration of Li2CO3? Explain
A saturated solution (aqueous) of the acid contains 11 g/L and has a pH = 2.94. What is the value of the acid dissociation constant?
containing granite basins tend to become acidified by acid rain more readily than lakes lying in calcium carbonate, CaCO3, limestone basins. Explain why?
What is the condensed structural formula of nonane? b. Is it a solid, liquid, or gas at room temperature?
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