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Explain what is the molality of a solution prepared by dissolving 6.21 g of glucose C6H12O6 in 1.50L of water?
What is the speed of an electron ejected from a metallic surface, where the metal work function is 2.06 eV and the radiation is at the following wavelengths
question the combustion of liquid ethanol c2h5oh produces carbon dioxide and water. after 5.6 of ethanol density 0.789
consider the following mechanism for the formation of a dna double helix from its strands a and ba b unstable helix
What is the maximum number of sets that can be assembles from 33.871 kg of quarters,10.432 kg of nickels and 7.990kg of dimes. What is the total mass(in grams) of the assembled coin sets.
For the reaction 2Mg(s) + O2(g) ? 2MgO(s), how many moles of O2 are required to react completely with 0.0232 moles of Mg
a) what is the ratio of conjugate base to conjugate acid after 100 ml of 1M HA is adjusted to a pH of 8? b) under the conditions in part a, how many moles of HA are present? How many moles of A- are present? c) What is the pH of the solution descr..
formic acid is titrated with 0.50 M sodium hydroxide, calculate the pH before any of the titrant (NaOH solution) is added and after 15.0 mL of the titrant has been added.
Calorimeters and heat capacity, If 2.500 g of Mg is burned in a constant volume calorimeter with a heat capacity of 1.10 kJ/degrees Celsius containing 1.500 L
How long must a current of 0.75 A pass through a sulfuric acid solution in order to liberate 0.100 L of H2 gas at STP
Since most potassium salts and nitrates are soluble in water, PbCrO4 must be the precipitate. The equation for this reaction is: Pb2+ + CrO4 2- -> PbCrO4. Calculate the theoretical yield using the starting quantities of both reactants.
What is the pH of an 85 mL solution containing .215 M NaHCO3 and .203 M Na2CO3?
what is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 torr at 25c vapor
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