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Calculate how many grams of solid NaOH are needed to prepare 500mL NaOH solution with a concentration of 0.4M
If the electron affinity for an element is a negative number does it mean that the anion of the element is more stable than the neutral atom. Explain
Write down the Empirical Formula if aA Compound Is 21.20% nitrogen, 6.06% Hydrogen, 24.30% sulfur , And 48.45% Oxygen?
Calculate the ionic strength of (a) 0.0061 M NaOH (b) 0.0005 M La(IO3)3 Assume complete dissociation at this low concentration and no hydrolysis reaction to form LaOH2.
Liquid butane C4H10 , the fuel used in many disposable lighters, has delta Hfinal=-147.5 kj and a density of 0.579 g/ml . Use Hess's law to calculate the enthalpy of combustion in kJ/mol.
If you wanted to combine equal numbers of Na and Cl atoms in a flask, how much Cl would you have to add if you added 23 grams of Na
A student's piece of galvanized metal had a mass of 42.73 grams before dipping it into the acid. Afterwards its mass was 42.22 grams. How many moles of zinc were removed? How many atoms is that?
A quantity of 7.48g of a compound is dissolved in water to make 300 mL of solution. The solution has an osmotic pressure of 1.43 atm at 27 Celsius. Calculate the molecular weight of the compound.
If you start with 1.000 g of sulfur (S8) and obtain 4.963 g of pure compound. What is the empirical formula of this compound?
Explain why the elimination reaction in acetone promotes an E2 mechanism while water promotes and E1 mechanism? Which product is more thermodynamically stable, the E or Z isomer?
Two reactions have the same activation energy, but their rates at the same temperature differ by a factor of 10. Explain.
What information is gained from VSEPR analysis? What is Valence Bond Theory?
Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.657 kJ of heat. It shrinks on cooling, and the atmosphere does 384J work on the balloon.
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