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A bottle of wine contains 14.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.
Which of the following is a statement of Hess's Law? Answer a. If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps
Ammonium sulfide in solid form decomposes to ammonia gas and hydrogen sulfide gas. It is a reversible reaction The Kp at 25 degrees C is .109 In an experiment Ammonia gas and hydrogen sulfide gas each have a partial pressure of .5 atmospheres and ..
Execute the following mathematical operations and express each answer in scientific notation with the correct number of significant
the pH of solution B is 9.2, then solution B has how many fold more or less H+ ions than does solution A?
Calculate the mass of propylene glycol ({rm{C}}_3 {rm{H}}_8 {rm{O}}_2 ) that must be added to 0.340 kg of water to reduce the vapor pressure by 2.86 torr at 40 ^circ ,{rm C} (P_{{rm H}_2{rm O}} at 40 ^circ,{rm C} = 55.3;{rm torr}).
Determine the mass of 100 mL of solution for this reaction: the results were 2.05 g of NaOH, 102.05 grams (total solution-when added with the water).
This solution is to be prepared by allowing water at a set pH to reach equilibrium with solid Fe(OH)3. What pH should be used for the aqueous solution to give this desired concentration of [Fe3+]
explain how a soap removes dirt from our bodies. describe the process in relation to the secondary attractive forces that are operative.
A 7.75 gram sample of methane gas has a volume of 876 milliliters at a pressure of 3.42 atm. The temperature of the CH4 gas sample is. answer in C please.
devise a general method for determining the fractional abundances of two or more isotopes from a mass spectrum. your method must include some means of measuring the signals
Know the reaction catalyzed by catalase. 1.What is the substrate of this enzyme? 2.What are the products? 3.Is catalase found in the cells of the human body?
If the dose of Na2CO3 is 100 mg/L , the volume of EDTA is 9.5 mL and the total hardness is 95 mg/L as CaCO3 calculate the % total hardness removed.
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