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If a system absorbs 54 J of heat as well as 24 J of work is done on it, define what is the value of delta E for this change?
An ice blue raspberry koolaid package is labeled to conation 6.2g of powered which will make 2 quarts of beverage to make 100ml of solution having the same concentration how much grams of powder needed
volume of a piece of galena is 4.7 cm3. determine the mass of that piece of galena if the density of galena is 7.5 gcm3
suppose that hydrogen atoms are prepared in the n=2 energy level. calculate the wavelength of light emitted by these excited atoms when returning to the ground state.
If you have 21.1 g of iron(II) nitrate that is dissolved to give 1.54 L of oslution, what is the molarity of the solution. What is the molarity of the nitrate ions
A gas system has initial volume and temperature of 8160mL and 467.0K. If the temperature changes to -151C, what will the resultant volume be in mL
Calculate the pH and pOH of a solution that has an H2O+ concentration of 1.3 x 10 -6M.
A reactor is used to decompose toxic H2S gas (that was removed from natural and petroleum gas). The reaction is given as:H2S (v) = 2H2 (v) + S2 (l)
At 25 c the ion product of water, Kw is 1.9 x 10^-14. What is the concentration of hydroxide ions in a solution where the concentration of hydrogen is found to be 5.0 x 10^-15 mol dm^-3.
What is the freezing point of a solution of 8.69 grams of the electrolyte sodium acetate NaCH3COO dissolved in 15 grams of water?
Calculate the pH after the following additions of the KOH solution (a) 10.0 mL (b) 11.5 mL (c) 15.0 mL (the Ka for CH3COOH = 1.8 x 10^-5)
in writing the lewis structure when we do not have to worry about electrons distribution in each atom alone and when we
Suggest a mechanism for the base catalyzed condensation of cyclohexanone with two molecules of benzaldehyde to give dibenzalcyclohexanone
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