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An aqueous KNO3 solution is made using 77.8g of KNO3 diluted to a total solution volume of 2.04L.
A) Compute the molarity of the solution. Presume a density of 1.05 g/mL for the solution.
B) Compute the molality of the solution. Presume a density of 1.05 g/mL for the solution.
C) Compute the mass percent of the solution. Presume a density of 1.05 g/mL for the solution.
Calculate the change in the mass of copper at the anode or cathode if the charge calculated above is passed through the cell described. Enter your answer as a positive quantity in mg. Mass change at the electrode = ? mg
A compound contains only carbon and nitrogen and is 46.2% carbon by mass. A gaseous sample of the compound has a density of 2.05 g/L at 927 torr and 105 °C
NH3 is a weak base (Kb=1.8 x 10^-5) and so the salt NH4Cl acts as a weak acid. What is the PH of a solution that is 0.049 M in NH4Cl?
Determine the number of bonding electrons and the number of nonbonding electrons in the structure of SI2. Determine the number of bonding electrons and the number of nonbonding electrons in the structure of CO2.
an element t burns in air with a blue flame forming white fumes which dissolve in water to form a solution that turns blue litmus paper red(t is not the actual symbol)
Given that the enthalpy of formation is -277.7 kJ/mol for C2H5OH(l) and -393.5 kJ/mol for CO2(g), find the enthalpy of formation for C6H12O6.
How many isomers, including stereoisomers, exist for the triacylglercerol which, on saponification, gives 2 molar equivalents of palmitate and 1 molar equivalent of stearate?
When aqueous HCl neutralizes benzoate anion, one of the actual acid species present is the hydronium ion, H3O+. Which is the more prevalent acid, HCl (pKa = -2.2) or H3O+ (pKa = 1.74). Write an equation that shows how H3O+ forms from HCl.
Calculate the lower heating value of the Brookeville Seam coal with the analysis given below with 10, 20, 30, 40, and 50% moisture contents . Comment on the percentage of the heat loss based on the gross or high heating value of the fuel in using ..
a 75ml mixture is prepared with 30ml of potassium iodide of concentration 0.180m 15ml of na2s203 of concentration
It is common to see the the strength of aspirin tablets listed in terms of the number of grains of ASA per tablet. using the conversion factor of 15.4 grains per gram ASA,
Kc = 9.7 at 900 K for the reaction NH3(g) + H2S(g) --> NH4HS(s) If the initial concentrations of NH3(g) and H2S(g) are 2.0 M, what is the equilibrium concentration of H2S(g)?
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