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An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz). Combustion of 3.50 g of this compound produced 5.13 g of carbon dioxide and 2.10 g of water.
How many moles of carbon, C, were in the original sample?
Erbium metal (Er) can be prepared by reacting erbium(III) fluoride with magnesium; the other product is magnesium fluoride. Write and balance the equation for the reaction.
Orange juice is an aqueous solution that derives much of it's acidity from citric acid. There are variations in the acidity of each brand depending on many factors
The mole fraction of substance A is 0.35. At 32 degrees C the vapor pressure of pure A is 87mmHg as well as the vapor pressure of pure B is 122 mmHg. Explain what is the total vapor pressure of the solution at this temperature
Ksp for CaF2 is 3.9E-11 at 25C. Assuming CaF2 dissociates completely after desolving and that there are no other equilibria affecting its solubility calculate the solubility of Caf2 in grams per liter.
A solution is made by dissolving 0.100 mols of NaOCl in 100.0 mL of water. The Ka of hypochlorous acid (HClO) is 3.0*x10^-8 at 25.0 C. a.) Write any relevant chemical equations or equilibrium reactions.
A 158-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
Using terms in the Hartree-Fock energy expression, explain why the lowest-energy triplet state of the He atom is higher in energy than the singlet state.
A stearic acid molecule consists of 18 carbon atoms linked together. Assuming that the thickness, t, of a monolayer is equal to the length of the stearic acid molecule, what is the size diameter of a carbon atom, s =t/18.
in the titration of 63.0 ml of 1.0 m methylamine ch3nh2 kb 4.4 multiplied by 10-4 with 0.50 m hcl calculate the ph
Suggest a reason why the cyclic intermediate in the formation of methyl-e-4-methoxycinnamte from p-anisaldehyde, might have two important groups in a trans relationship
an average human body produces about 10 mj of heat each day through metabolic activity. if a human body were an
a) A hydrocarbon fuel (containing no atomic oxygen) is burned with air. The flue gas composition on a dry basis is 1.0 mol% CO, 6.5 mol% CO2, 8.0 mol% O2, and 84.5 mol% N2. Calculate the ratio of atomic hydrogen to carbon in the fuel and speculate wh..
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