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A 0.200 M solution of a weak monoprotic acid HA is found to have a pH of 3.00 at room temperature. What is the ionization constant of this acid?
What is the percentage chlorine by mass in the organic compound?" and got an answer of 37.1% Cl, which im pretty sure is right.
Lucite is 71.4% carbon, 9.59% hydrogen, and 19.01% oxygen. What is the empirical formula for Lucite?
you have 19.16 g of CH4 and 22.13 g of O2. How many grams of CO2 would be generated, CH4 + 2 O2 --> CO2 +2 H2O
The compound ZnI4 is best described as anions in a face-centered cubic unit cell with the cations in the tetrahedral holes. What is the density of this compound?
If 4.00 g of the unknown compound contained 0.133 mol of C and 0.267 mol of H, how many moles of oxygen, O, were in the sample?
A sample containing 2.40 {rm moles} neon gas has a volume of 8.00 {rm L}. Assume that the pressure and the temperature remain constant.
A compound contains 10.13% C, and 89.87% Cl (by mass). Determine both the empirical formula and the molecular formula of the compound given that the molar mass is 236g/mol
Describe spectroscopic or chemical tests to distinguish between the following pairs of compounds
The DHfus of ethanol (C2H5OH) is 4.60 kJ/mol. How many kilojoules of heat are required to melt 24.5 g of ethanol at its freezing point.
Octane (C8H18) undergoes combustion according to the following thermochemical equation: 2C8H18(l) + 25O2(g) ? 16CO2(g) + 18H2O(l) ?H°rxn = -11,020 kJ/mol. Given that ?H°f[CO2(g)] = -393.5 kJ/mol
How many moles of N2 are produced by the decomposition of 1.40 of NaN3 ?
A pipette is used to add 46 mL of 0.3 M Pb(NO3)2 to a 273.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8
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